It is currently 18 Oct 2017, 04:56

Close

GMAT Club Daily Prep

Thank you for using the timer - this advanced tool can estimate your performance and suggest more practice questions. We have subscribed you to Daily Prep Questions via email.

Customized
for You

we will pick new questions that match your level based on your Timer History

Track
Your Progress

every week, we’ll send you an estimated GMAT score based on your performance

Practice
Pays

we will pick new questions that match your level based on your Timer History

Not interested in getting valuable practice questions and articles delivered to your email? No problem, unsubscribe here.

Close

Request Expert Reply

Confirm Cancel

Events & Promotions

Events & Promotions in June
Open Detailed Calendar

A certain car can travel 40 minutes on a gallon of gasoline at 60 mile

  new topic post reply Question banks Downloads My Bookmarks Reviews Important topics  
Author Message
TAGS:

Hide Tags

Expert Post
Math Expert
User avatar
V
Joined: 02 Sep 2009
Posts: 41886

Kudos [?]: 128688 [0], given: 12182

A certain car can travel 40 minutes on a gallon of gasoline at 60 mile [#permalink]

Show Tags

New post 10 Jul 2015, 02:35
Expert's post
1
This post was
BOOKMARKED
00:00
A
B
C
D
E

Difficulty:

  35% (medium)

Question Stats:

73% (01:47) correct 27% (02:04) wrong based on 153 sessions

HideShow timer Statistics

A certain car can travel 40 minutes on a gallon of gasoline at 60 miles per hour. If the car had started with a full tank and had 8 gallons of gasoline left in its tank at the end, then what percent of the tank was used to travel 80 miles at 60 mph?

A. 15%
B. 20%
C. 25%
D. 30%
E. 40%

Kudos for a correct solution.
[Reveal] Spoiler: OA

_________________

New to the Math Forum?
Please read this: Ultimate GMAT Quantitative Megathread | All You Need for Quant | PLEASE READ AND FOLLOW: 12 Rules for Posting!!!

Resources:
GMAT Math Book | Triangles | Polygons | Coordinate Geometry | Factorials | Circles | Number Theory | Remainders; 8. Overlapping Sets | PDF of Math Book; 10. Remainders | GMAT Prep Software Analysis | SEVEN SAMURAI OF 2012 (BEST DISCUSSIONS) | Tricky questions from previous years.

Collection of Questions:
PS: 1. Tough and Tricky questions; 2. Hard questions; 3. Hard questions part 2; 4. Standard deviation; 5. Tough Problem Solving Questions With Solutions; 6. Probability and Combinations Questions With Solutions; 7 Tough and tricky exponents and roots questions; 8 12 Easy Pieces (or not?); 9 Bakers' Dozen; 10 Algebra set. ,11 Mixed Questions, 12 Fresh Meat

DS: 1. DS tough questions; 2. DS tough questions part 2; 3. DS tough questions part 3; 4. DS Standard deviation; 5. Inequalities; 6. 700+ GMAT Data Sufficiency Questions With Explanations; 7 Tough and tricky exponents and roots questions; 8 The Discreet Charm of the DS; 9 Devil's Dozen!!!; 10 Number Properties set., 11 New DS set.


What are GMAT Club Tests?
Extra-hard Quant Tests with Brilliant Analytics

Kudos [?]: 128688 [0], given: 12182

Expert Post
Math Forum Moderator
avatar
B
Joined: 20 Mar 2014
Posts: 2676

Kudos [?]: 1723 [0], given: 792

Concentration: Finance, Strategy
Schools: Kellogg '18 (M)
GMAT 1: 750 Q49 V44
GPA: 3.7
WE: Engineering (Aerospace and Defense)
GMAT ToolKit User Premium Member Reviews Badge
A certain car can travel 40 minutes on a gallon of gasoline at 60 mile [#permalink]

Show Tags

New post 10 Jul 2015, 04:19
Bunuel wrote:
A certain car can travel 40 minutes on a gallon of gasoline at 60 miles per hour. If the car had started with a full tank and had 8 gallons of gasoline left in its tank at the end, then what percent of the tank was used to travel 80 miles at 60 mph?

A. 15%
B. 20%
C. 25%
D. 30%
E. 40%

Kudos for a correct solution.


Total time for travelling 80 miles @ 60 mph = 80/60 = 4/3 hour = 80 minutes.

Given, the car uses 1 gallon for every 40 minutes of driving @ 60 mph. Thus in 80 minutes it will use = 2 gallons. Thus, full tank = 2+8 = 10 gallons ---> 2/10 = 20% of the fuel used. B is the correct answer.
_________________

Thursday with Ron updated list as of July 1st, 2015: http://gmatclub.com/forum/consolidated-thursday-with-ron-list-for-all-the-sections-201006.html#p1544515
Rules for Posting in Quant Forums: http://gmatclub.com/forum/rules-for-posting-please-read-this-before-posting-133935.html
Writing Mathematical Formulae in your posts: http://gmatclub.com/forum/rules-for-posting-please-read-this-before-posting-133935.html#p1096628
GMATCLUB Math Book: http://gmatclub.com/forum/gmat-math-book-in-downloadable-pdf-format-130609.html
Everything Related to Inequalities: http://gmatclub.com/forum/inequalities-made-easy-206653.html#p1582891
Inequalities tips: http://gmatclub.com/forum/inequalities-tips-and-hints-175001.html
Debrief, 650 to 750: http://gmatclub.com/forum/650-to-750-a-10-month-journey-to-the-score-203190.html

Kudos [?]: 1723 [0], given: 792

Expert Post
SVP
SVP
User avatar
G
Joined: 08 Jul 2010
Posts: 1834

Kudos [?]: 2276 [0], given: 51

Location: India
GMAT: INSIGHT
WE: Education (Education)
Reviews Badge
Re: A certain car can travel 40 minutes on a gallon of gasoline at 60 mile [#permalink]

Show Tags

New post 10 Jul 2015, 07:15
Bunuel wrote:
A certain car can travel 40 minutes on a gallon of gasoline at 60 miles per hour. If the car had started with a full tank and had 8 gallons of gasoline left in its tank at the end, then what percent of the tank was used to travel 80 miles at 60 mph?

A. 15%
B. 20%
C. 25%
D. 30%
E. 40%

Kudos for a correct solution.


Let, Tank capacity = T gallon
Used Fuel = (T-8) gallons
Distance Travelled (@60 miles/hr) = 80 miles

Distance travelled in 1 gallon = Distance travelled in 40 mins (@60 miles/hr) = (60/60)*40 = 40 miles
Fuel used to travel 80 miles = (80/40) = 2 gallon

i.e. Used fuel = (T-8) = 2 gallon
i.e. T = 10 Gallons

i.e. Used Fuel = (2/10)*100 = 20%
_________________

Prosper!!!
GMATinsight
Bhoopendra Singh and Dr.Sushma Jha
e-mail: info@GMATinsight.com I Call us : +91-9999687183 / 9891333772
Online One-on-One Skype based classes and Classroom Coaching in South and West Delhi
http://www.GMATinsight.com/testimonials.html

22 ONLINE FREE (FULL LENGTH) GMAT CAT (PRACTICE TESTS) LINK COLLECTION

Kudos [?]: 2276 [0], given: 51

Expert Post
Math Forum Moderator
avatar
P
Joined: 02 Aug 2009
Posts: 4969

Kudos [?]: 5458 [0], given: 112

Re: A certain car can travel 40 minutes on a gallon of gasoline at 60 mile [#permalink]

Show Tags

New post 10 Jul 2015, 07:38
Bunuel wrote:
A certain car can travel 40 minutes on a gallon of gasoline at 60 miles per hour. If the car had started with a full tank and had 8 gallons of gasoline left in its tank at the end, then what percent of the tank was used to travel 80 miles at 60 mph?

A. 15%
B. 20%
C. 25%
D. 30%
E. 40%

Kudos for a correct solution.


Hi,
Not a very well worded Q as we have to assume things not stated in the question.
We have not been told that the car travelled only this stretch of 80 miles meaning the veh started at that speed and stopped at that speed and nothing else was travelled..
_________________

Absolute modulus :http://gmatclub.com/forum/absolute-modulus-a-better-understanding-210849.html#p1622372
Combination of similar and dissimilar things : http://gmatclub.com/forum/topic215915.html

Kudos [?]: 5458 [0], given: 112

Director
Director
avatar
G
Joined: 21 May 2013
Posts: 535

Kudos [?]: 71 [0], given: 487

CAT Tests
Re: A certain car can travel 40 minutes on a gallon of gasoline at 60 mile [#permalink]

Show Tags

New post 11 Jul 2015, 11:03
Bunuel wrote:
A certain car can travel 40 minutes on a gallon of gasoline at 60 miles per hour. If the car had started with a full tank and had 8 gallons of gasoline left in its tank at the end, then what percent of the tank was used to travel 80 miles at 60 mph?

A. 15%
B. 20%
C. 25%
D. 30%
E. 40%

Kudos for a correct solution.


Speed of the car=60 miles per hours i.e 1 mile per minute
Therefore, to travel 80 miles the car takes 80 minutes @60 miles per hour
Also, since it runs for 40 minutes on 1 gallon, it will take 2 gallons to run for 80 minutes
Fuel left=8 gallons
Consumed=2 gallons
% of tank used=2/10=20%
Answer B

Kudos [?]: 71 [0], given: 487

Expert Post
1 KUDOS received
Math Expert
User avatar
V
Joined: 02 Sep 2009
Posts: 41886

Kudos [?]: 128688 [1], given: 12182

Re: A certain car can travel 40 minutes on a gallon of gasoline at 60 mile [#permalink]

Show Tags

New post 13 Jul 2015, 02:55
1
This post received
KUDOS
Expert's post
2
This post was
BOOKMARKED
Bunuel wrote:
A certain car can travel 40 minutes on a gallon of gasoline at 60 miles per hour. If the car had started with a full tank and had 8 gallons of gasoline left in its tank at the end, then what percent of the tank was used to travel 80 miles at 60 mph?

A. 15%
B. 20%
C. 25%
D. 30%
E. 40%

Kudos for a correct solution.


800score Official Solution:

(B) 60 miles per hour is a mile a minute. 80 miles at 60 miles per hour will take 80 minutes. Since 40 minutes is 1 gallon, 80 minutes will be 2 gallons. The full tank holds 2 + 8 = 10 gallons. 2 gal/10 gal = 2/10, which is 20%.

The correct answer is choice (B).
_________________

New to the Math Forum?
Please read this: Ultimate GMAT Quantitative Megathread | All You Need for Quant | PLEASE READ AND FOLLOW: 12 Rules for Posting!!!

Resources:
GMAT Math Book | Triangles | Polygons | Coordinate Geometry | Factorials | Circles | Number Theory | Remainders; 8. Overlapping Sets | PDF of Math Book; 10. Remainders | GMAT Prep Software Analysis | SEVEN SAMURAI OF 2012 (BEST DISCUSSIONS) | Tricky questions from previous years.

Collection of Questions:
PS: 1. Tough and Tricky questions; 2. Hard questions; 3. Hard questions part 2; 4. Standard deviation; 5. Tough Problem Solving Questions With Solutions; 6. Probability and Combinations Questions With Solutions; 7 Tough and tricky exponents and roots questions; 8 12 Easy Pieces (or not?); 9 Bakers' Dozen; 10 Algebra set. ,11 Mixed Questions, 12 Fresh Meat

DS: 1. DS tough questions; 2. DS tough questions part 2; 3. DS tough questions part 3; 4. DS Standard deviation; 5. Inequalities; 6. 700+ GMAT Data Sufficiency Questions With Explanations; 7 Tough and tricky exponents and roots questions; 8 The Discreet Charm of the DS; 9 Devil's Dozen!!!; 10 Number Properties set., 11 New DS set.


What are GMAT Club Tests?
Extra-hard Quant Tests with Brilliant Analytics

Kudos [?]: 128688 [1], given: 12182

GMAT Club Legend
GMAT Club Legend
User avatar
Joined: 09 Sep 2013
Posts: 16713

Kudos [?]: 273 [0], given: 0

Premium Member
Re: A certain car can travel 40 minutes on a gallon of gasoline at 60 mile [#permalink]

Show Tags

New post 23 Aug 2017, 04:50
Hello from the GMAT Club BumpBot!

Thanks to another GMAT Club member, I have just discovered this valuable topic, yet it had no discussion for over a year. I am now bumping it up - doing my job. I think you may find it valuable (esp those replies with Kudos).

Want to see all other topics I dig out? Follow me (click follow button on profile). You will receive a summary of all topics I bump in your profile area as well as via email.
_________________

GMAT Books | GMAT Club Tests | Best Prices on GMAT Courses | GMAT Mobile App | Math Resources | Verbal Resources

Kudos [?]: 273 [0], given: 0

Intern
Intern
avatar
B
Joined: 22 Aug 2017
Posts: 3

Kudos [?]: 1 [0], given: 2

A certain car can travel 40 minutes on a gallon of gasoline at 60 mile [#permalink]

Show Tags

New post 23 Aug 2017, 09:36
40 miles req 1 gallon of oil
therefore, 80 miles will require 2 gallons of oil.

8 gallons oil is left after the ride. So total tank capacity is 2+8=10 gallons.

%oil used for travelling 80 miles at 60 m/hr = 2/10*100=20%

Correct answer is B.

Kudos [?]: 1 [0], given: 2

Director
Director
avatar
G
Joined: 07 Dec 2014
Posts: 812

Kudos [?]: 247 [0], given: 12

A certain car can travel 40 minutes on a gallon of gasoline at 60 mile [#permalink]

Show Tags

New post 23 Aug 2017, 11:37
Bunuel wrote:
A certain car can travel 40 minutes on a gallon of gasoline at 60 miles per hour. If the car had started with a full tank and had 8 gallons of gasoline left in its tank at the end, then what percent of the tank was used to travel 80 miles at 60 mph?

A. 15%
B. 20%
C. 25%
D. 30%
E. 40%


at 60 mph, 40 minutes=40 miles
if 40 miles take 1 gallon,
then 80 miles take 2 gallons
2/(8+2)=.2=20%
B

Kudos [?]: 247 [0], given: 12

A certain car can travel 40 minutes on a gallon of gasoline at 60 mile   [#permalink] 23 Aug 2017, 11:37
Display posts from previous: Sort by

A certain car can travel 40 minutes on a gallon of gasoline at 60 mile

  new topic post reply Question banks Downloads My Bookmarks Reviews Important topics  


cron

GMAT Club MBA Forum Home| About| Terms and Conditions| GMAT Club Rules| Contact| Sitemap

Powered by phpBB © phpBB Group | Emoji artwork provided by EmojiOne

Kindly note that the GMAT® test is a registered trademark of the Graduate Management Admission Council®, and this site has neither been reviewed nor endorsed by GMAC®.