It is currently 13 Dec 2017, 10:34

Decision(s) Day!:

CHAT Rooms | Ross R1 | Kellogg R1 | Darden R1 | Tepper R1


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 car goes 15 miles on a gallon of gas when it is driven at 50 miles

  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: 42583

Kudos [?]: 135518 [0], given: 12697

A car goes 15 miles on a gallon of gas when it is driven at 50 miles [#permalink]

Show Tags

New post 30 Oct 2017, 23:01
00:00
A
B
C
D
E

Difficulty:

  15% (low)

Question Stats:

84% (01:08) correct 16% (01:32) wrong based on 61 sessions

HideShow timer Statistics

A car goes 15 miles on a gallon of gas when it is driven at 50 miles per hour. When the car is driven at 60 miles per hour it only goes 80 percent as far. How many gallons of gas will it take to travel 120 miles driving at 60 miles per hour?

(A) 2
(B) 6.4
(C) 8
(D) 9.6
(E) 10
[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 [?]: 135518 [0], given: 12697

Intern
Intern
avatar
B
Joined: 09 Oct 2017
Posts: 2

Kudos [?]: 0 [0], given: 40

Re: A car goes 15 miles on a gallon of gas when it is driven at 50 miles [#permalink]

Show Tags

New post 31 Oct 2017, 00:39
At 60 miles per hour, the car will go 15*80%=12 miles on a gallon of gas.

So, 1 {gallon} = 12 {miles}; multiply both sides with ten: 10 {gallon} = 120 {miles}.

Hence, option (E).

Kudos [?]: 0 [0], given: 40

Expert Post
1 KUDOS received
Target Test Prep Representative
User avatar
S
Status: Founder & CEO
Affiliations: Target Test Prep
Joined: 14 Oct 2015
Posts: 1931

Kudos [?]: 1015 [1], given: 3

Location: United States (CA)
Re: A car goes 15 miles on a gallon of gas when it is driven at 50 miles [#permalink]

Show Tags

New post 01 Nov 2017, 16:06
1
This post received
KUDOS
Expert's post
Bunuel wrote:
A car goes 15 miles on a gallon of gas when it is driven at 50 miles per hour. When the car is driven at 60 miles per hour it only goes 80 percent as far. How many gallons of gas will it take to travel 120 miles driving at 60 miles per hour?

(A) 2
(B) 6.4
(C) 8
(D) 9.6
(E) 10


When the car is driven at 60 mph, the car goes 0.8 x 15 = 12 miles, so the rate is 12 miles per gallon.

Thus, to drive 120 miles at 60 mph, the number of gallons needed is 120/12 = 10 gallons of gas.

Answer: E
_________________

Scott Woodbury-Stewart
Founder and CEO

GMAT Quant Self-Study Course
500+ lessons 3000+ practice problems 800+ HD solutions

Kudos [?]: 1015 [1], given: 3

Manager
Manager
User avatar
G
Joined: 07 Jul 2012
Posts: 219

Kudos [?]: 69 [0], given: 65

Location: India
Concentration: Finance
Re: A car goes 15 miles on a gallon of gas when it is driven at 50 miles [#permalink]

Show Tags

New post 01 Nov 2017, 17:53
Distance traveled by car @ 60mph= 15*\(\frac{80}{100}\)= 12 miles

Rate of consumption of gas= 12 miles per gallon.

12 miles take consumption of gas= 1 gallon
1...................................................= \(\frac{1}{12}\)

120...............................................= \(\frac{1}{12}\)*120= 10 gallon

Answer: E.
_________________

Kindly hit kudos if my post helps!

Kudos [?]: 69 [0], given: 65

Re: A car goes 15 miles on a gallon of gas when it is driven at 50 miles   [#permalink] 01 Nov 2017, 17:53
Display posts from previous: Sort by

A car goes 15 miles on a gallon of gas when it is driven at 50 miles

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


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®.