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

 It is currently 03 Jun 2015, 10:05

### 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

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

# Events & Promotions

###### Events & Promotions in June
Open Detailed Calendar

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

Author Message
TAGS:
Director
Joined: 12 Jun 2006
Posts: 534
Followers: 1

Kudos [?]: 31 [0], given: 1

Mr. Jones drove from Town A to Town B in x hours. On the [#permalink]  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
Joined: 08 Jun 2007
Posts: 584
Followers: 2

Kudos [?]: 80 [0], given: 0

Re: Mr. Jones travels [#permalink]  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
Joined: 29 Aug 2007
Posts: 110
Followers: 1

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

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
Joined: 29 Mar 2007
Posts: 2588
Followers: 17

Kudos [?]: 238 [0], given: 0

Re: Mr. Jones travels [#permalink]  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
Joined: 07 Jul 2004
Posts: 5074
Location: Singapore
Followers: 22

Kudos [?]: 190 [0], given: 0

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
Similar topics Replies Last post
Similar
Topics:
It took the bus 4 hours to get from town A to town B. What 12 07 Sep 2008, 22:43
It took the bus 4 hours to get from town A to town B. What 4 02 Aug 2008, 01:45
It took the bus 4 hours to get from town A to town B. What 2 23 May 2008, 00:48
Mr. Jones drove from Town A to Town B in x hours. On the 2 07 Apr 2008, 16:15
If a bus took 4 hours to get from town a to town b, what was 10 26 Apr 2007, 22:46
Display posts from previous: Sort by