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

It is currently 02 Oct 2014, 00:56

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.

Events & Promotions

Events & Promotions in June
Open Detailed Calendar

Mr. Jones drove from Town A to Town B in x hours. On the

  Question banks Downloads My Bookmarks Reviews Important topics  
Author Message
TAGS:
Director
Director
avatar
Joined: 12 Jun 2006
Posts: 539
Followers: 1

Kudos [?]: 17 [0], given: 1

Mr. Jones drove from Town A to Town B in x hours. On the [#permalink] New post 17 Sep 2007, 19:12
Mr. Jones drove from Town A to Town B in x hours. On the return trip over the same route, his average speed was twice as fast. Which of the following expresses the total number of driving hours for the round trip?

(A) 2x/3
(B) 3x/2
(C) 5x/3
(D) 2x
(E) 3x
Director
Director
User avatar
Joined: 08 Jun 2007
Posts: 583
Followers: 2

Kudos [?]: 70 [0], given: 0

Re: Mr. Jones travels [#permalink] New post 17 Sep 2007, 19:14
ggarr wrote:
Mr. Jones drove from Town A to Town B in x hours. On the return trip over the same route, his average speed was twice as fast. Which of the following expresses the total number of driving hours for the round trip?

(A) 2x/3
(B) 3x/2
(C) 5x/3
(D) 2x
(E) 3x


B
Simple while coming since speed was double time taken was half the original x/2
So total time x+ x/2 = 3x/2
Manager
Manager
avatar
Joined: 29 Aug 2007
Posts: 111
Followers: 1

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

 [#permalink] New post 17 Sep 2007, 19:35
You cannot add rates in Motion problems. you can only add rates in Work / rate problems

Given this ,

Onward

rate = r

time =x

distance = rx

Toward

rate = 2r

time = t2
distance = rx

you can solve for t2 given this

2r * t2 = rx

t2-= x/ 2

Total time = X + X/2 = 3x/ 2
CEO
CEO
User avatar
Joined: 29 Mar 2007
Posts: 2593
Followers: 16

Kudos [?]: 193 [0], given: 0

Re: Mr. Jones travels [#permalink] New post 17 Sep 2007, 20:10
ggarr wrote:
Mr. Jones drove from Town A to Town B in x hours. On the return trip over the same route, his average speed was twice as fast. Which of the following expresses the total number of driving hours for the round trip?

(A) 2x/3
(B) 3x/2
(C) 5x/3
(D) 2x
(E) 3x



traveled X hours from A to B.

Traveled X/2 hours from B to A.

X+X/2--> 2X/2+X/2=3X/2

B
GMAT Club Legend
GMAT Club Legend
User avatar
Joined: 07 Jul 2004
Posts: 5097
Location: Singapore
Followers: 19

Kudos [?]: 149 [0], given: 0

 [#permalink] New post 17 Sep 2007, 21:48
Let distance = D km/h

D = s(x) km

Let time taken for return trip be t

D = 2s(t) km

s(x) = 2s(t)
t = x/2 hours

total time = x + x/2 = 3x/2
  [#permalink] 17 Sep 2007, 21:48
    Similar topics Author Replies Last post
Similar
Topics:
It took the bus 4 hours to get from town A to town B. What arjtryarjtry 12 07 Sep 2008, 22:43
It took the bus 4 hours to get from town A to town B. What arjtryarjtry 4 02 Aug 2008, 01:45
It took the bus 4 hours to get from town A to town B. What sondenso 2 23 May 2008, 00:48
Mr. Jones drove from Town A to Town B in x hours. On the el1981 2 07 Apr 2008, 16:15
If a bus took 4 hours to get from town a to town b, what was ayl989 10 26 Apr 2007, 22:46
Display posts from previous: Sort by

Mr. Jones drove from Town A to Town B in x hours. On the

  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®.