Find all School-related info fast with the new School-Specific MBA Forum

It is currently 24 Apr 2014, 03:16

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.

Events & Promotions

Events & Promotions in June
Open Detailed Calendar

Two heavily loaded sixteen-wheeler transport trucks are 770

  Question banks Downloads My Bookmarks Reviews Important topics  
Author Message
TAGS:
Intern
Intern
User avatar
Joined: 05 Jul 2013
Posts: 6
Location: Germany
GMAT 1: 640 Q38 V39
GMAT 2: 700 Q47 V39
GPA: 3.4
WE: Investment Banking (Real Estate)
Followers: 0

Kudos [?]: 5 [0], given: 3

Two heavily loaded sixteen-wheeler transport trucks are 770 [#permalink] New post 06 Sep 2013, 02:29
00:00
A
B
C
D
E

Difficulty:

  35% (medium)

Question Stats:

69% (02:33) correct 30% (01:59) wrong based on 59 sessions
Two heavily loaded sixteen-wheeler transport trucks are 770 kilometers apart, sitting at two rest stops on opposite sides of the same highway. Driver A begins heading down the highway driving at an average speed of 90 kilometers per hour. Exactly one hour later, Driver B starts down the highway toward Driver A, maintaining an average speed of 80 kilometers per hour. How many kilometers farther than Driver B, will Driver A have driven when they meet and pass each other on the highway?

A) 90
B) 130
C) 150
D) 320
E) 450
[Reveal] Spoiler: OA

Last edited by Bunuel on 06 Sep 2013, 02:37, edited 1 time in total.
Renamed the topic and edited the question.
Math Expert
User avatar
Joined: 02 Sep 2009
Posts: 17394
Followers: 2889

Kudos [?]: 18492 [0], given: 2361

GMAT Tests User CAT Tests
Re: Two heavily loaded sixteen-wheeler transport trucks are 770 [#permalink] New post 06 Sep 2013, 02:38
Expert's post
caro2789 wrote:
Two heavily loaded sixteen-wheeler transport trucks are 770 kilometers apart, sitting at two rest stops on opposite sides of the same highway. Driver A begins heading down the highway driving at an average speed of 90 kilometers per hour. Exactly one hour later, Driver B starts down the highway toward Driver A, maintaining an average speed of 80 kilometers per hour. How many kilometers farther than Driver B, will Driver A have driven when they meet and pass each other on the highway?

A) 90
B) 130
C) 150
D) 320
E) 450



In one hour A covers 90 kilometers. So, by the time B starts traveling the distance between the trucks is 770-90=680 kilometers.

To cover that distance the trucks need (total distance)/(combined rate)=680/(90+80)=4 hours.

In 4 hours B covered 4*80=320 kilometers and A covered 770-320=450 kilometers.

The difference = 450 - 320 = 130 kilometers.

Answer: B.

P.S. Please read carefully and follow: rules-for-posting-please-read-this-before-posting-133935.html Please pay attention to the rule #3. Thank you.
_________________

NEW TO MATH FORUM? PLEASE READ THIS: ALL YOU NEED FOR QUANT!!!

PLEASE READ AND FOLLOW: 11 Rules for Posting!!!

RESOURCES: [GMAT MATH BOOK]; 1. Triangles; 2. Polygons; 3. Coordinate Geometry; 4. Factorials; 5. Circles; 6. Number Theory; 7. Remainders; 8. Overlapping Sets; 9. PDF of Math Book; 10. Remainders; 11. GMAT Prep Software Analysis NEW!!!; 12. SEVEN SAMURAI OF 2012 (BEST DISCUSSIONS) NEW!!!; 12. Tricky questions from previous years. NEW!!!;

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?
25 extra-hard Quant Tests

1 KUDOS received
Intern
Intern
Joined: 23 Mar 2011
Posts: 42
Location: India
Concentration: Marketing, Operations
Schools: Schulich '16 (A)
GMAT 1: 690 Q48 V36
WE: Operations (Telecommunications)
Followers: 0

Kudos [?]: 8 [1] , given: 21

Re: Two heavily loaded sixteen-wheeler transport trucks are 770 [#permalink] New post 06 Sep 2013, 03:07
1
This post received
KUDOS
a-Distance traveled by A
b-Distance traveled by B

a+b=770
need to find a-b=?

Equating Time taken to meet-
\frac{a}{90} = 1+\frac{b}{80}

Solve with b=770-a in above
a=450, so b=770-450=320
a-b=450-320=130
Senior Manager
Senior Manager
User avatar
Joined: 17 Dec 2012
Posts: 359
Location: India
Followers: 9

Kudos [?]: 128 [0], given: 8

Re: Two heavily loaded sixteen-wheeler transport trucks are 770 [#permalink] New post 06 Sep 2013, 17:19
caro2789 wrote:
Two heavily loaded sixteen-wheeler transport trucks are 770 kilometers apart, sitting at two rest stops on opposite sides of the same highway. Driver A begins heading down the highway driving at an average speed of 90 kilometers per hour. Exactly one hour later, Driver B starts down the highway toward Driver A, maintaining an average speed of 80 kilometers per hour. How many kilometers farther than Driver B, will Driver A have driven when they meet and pass each other on the highway?

A) 90
B) 130
C) 150
D) 320
E) 450


1. Driver A traveled totally for 1 hr + (770-90)/ (90+80) hrs= 5 hrs. Distance traveled = 90*5=450 km
2. Driver B traveled 1 hr less i.e., he traveled for 4 hrs. Distance traveled = 80*4=320 km
3. Difference is, 450-320=130km
_________________

Srinivasan Vaidyaraman
sravna@gmail.com

Sravna Test Prep
http://www.sravna.com
Online courses and 1-on-1 Online Tutoring for the GMAT and the GRE

Senior Manager
Senior Manager
User avatar
Joined: 13 May 2013
Posts: 476
Followers: 0

Kudos [?]: 36 [0], given: 134

Re: Two heavily loaded sixteen-wheeler transport trucks are 770 [#permalink] New post 09 Sep 2013, 02:46
Two heavily loaded sixteen-wheeler transport trucks are 770 kilometers apart, sitting at two rest stops on opposite sides of the same highway. Driver A begins heading down the highway driving at an average speed of 90 kilometers per hour. Exactly one hour later, Driver B starts down the highway toward Driver A, maintaining an average speed of 80 kilometers per hour. How many kilometers farther than Driver B, will Driver A have driven when they meet and pass each other on the highway?

We are looking for how long it takes the two drivers to meet at some point between both ends of the highway. We are NOT looking for how long it takes for each truck to reach the other side of the highway. If Driver B sets off one hour after A, then A has already traveled for 90km when driver B begins to move. After one hour, driver A and B have to cover 770-90 = 680 km. Their total average speed is 90+80 km/h which means it will take them 680km/170km/h = 4 hours. In this time A travels 90 + (4*90) = 450 km which means that
B travels 770 - 450 = 320 km so A travels 130 km more than B.

ANSWER: B) 130

I got tripped up when I couldn't figure out how to determine how long B traveled for. I was trying to solve for how long it would take B to travel from one side of the highway to the other when the question was asking for how long it would take for them too pass one another. All this means is that A travels for one more hour than B and that from that distance (770-90 = 680km) we can determine how long it took for them to meet up. When we calculate how many km A traveled, we multiply the time it took A to meet B by its rate and add in the 90 km it traveled before B set off.
Manager
Manager
Joined: 26 Feb 2012
Posts: 118
Location: India
Concentration: General Management, Finance
WE: Engineering (Telecommunications)
Followers: 0

Kudos [?]: 11 [0], given: 56

Re: Two heavily loaded sixteen-wheeler transport trucks are 770 [#permalink] New post 27 Feb 2014, 17:45
Bunuel wrote:
caro2789 wrote:
Two heavily loaded sixteen-wheeler transport trucks are 770 kilometers apart, sitting at two rest stops on opposite sides of the same highway. Driver A begins heading down the highway driving at an average speed of 90 kilometers per hour. Exactly one hour later, Driver B starts down the highway toward Driver A, maintaining an average speed of 80 kilometers per hour. How many kilometers farther than Driver B, will Driver A have driven when they meet and pass each other on the highway?..

A) 90
B) 130
C) 150
D) 320
E) 450



In one hour A covers 90 kilometers. So, by the time B starts traveling the distance between the trucks is 770-90=680 kilometers.

To cover that distance the trucks need (total distance)/(combined rate)=680/(90+80)=4 hours.

In 4 hours B covered 4*80=320 kilometers and A covered 770-320=450 kilometers.

The difference = 450 - 320 = 130 kilometers.

Answer: B.

P.S. Please read carefully and follow: rules-for-posting-please-read-this-before-posting-133935.html Please pay attention to the rule #3. Thank you.


Hi Bunuel
Please let me understand the red line sentence.....

Rgds
Prasannajeet
1 KUDOS received
Senior Manager
Senior Manager
Status: The Best Or Nothing
Joined: 27 Dec 2012
Posts: 418
Location: India
Concentration: General Management, Technology
WE: Information Technology (Computer Software)
Followers: 1

Kudos [?]: 73 [1] , given: 153

Re: Two heavily loaded sixteen-wheeler transport trucks are 770 [#permalink] New post 28 Feb 2014, 00:37
1
This post received
KUDOS
Difference between Distance travelled by A & Distance travelled by B when they crossed each other
_________________

Kindly press "Kudos" to appreciate

Re: Two heavily loaded sixteen-wheeler transport trucks are 770   [#permalink] 28 Feb 2014, 00:37
    Similar topics Author Replies Last post
Similar
Topics:
New posts Three trucks, A, B, C, working together, can move a load of cloaked_vessel 1 08 Jan 2005, 19:50
New posts A truck drive wants to load as many identical cylindrical alobs 6 16 Oct 2006, 19:12
New posts 1 Two heavily loaded sixteen-wheeler transport trucks are 770 Vemuri 5 06 Apr 2008, 09:05
New posts Experts publish their posts in the topic A worker can load 1 full truck in 6 hours. A second worker ralanko 2 30 Mar 2012, 12:29
New posts 4 Experts publish their posts in the topic In a certain population, the two most heavily diagnosed manugmat123 3 24 Apr 2013, 09:01
Display posts from previous: Sort by

Two heavily loaded sixteen-wheeler transport trucks are 770

  Question banks Downloads My Bookmarks Reviews Important topics  


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

Powered by phpBB © phpBB Group and phpBB SEO

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®.