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# Speed..............

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Manager
Joined: 02 Sep 2008
Posts: 103

Kudos [?]: 105 [0], given: 1

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01 Apr 2009, 03:22
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Question Stats:

100% (01:50) correct 0% (00:00) wrong based on 3 sessions

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This topic is locked. If you want to discuss this question please re-post it in the respective forum.

This topic is locked. If you want to discuss this question please re-post it in the respective forum.

. A bus trip of 450 miles would have taken 1 hour less if the average speed S for the trip had been greater by 5 miles per hour. What was the average speed S, in miles per hour, for the trip?
(A) 10
(B) 40
(C) 45
(D) 50
(E) 55

Kudos [?]: 105 [0], given: 1

Director
Joined: 04 Jan 2008
Posts: 893

Kudos [?]: 766 [0], given: 17

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01 Apr 2009, 04:26
try with 45
_________________

http://gmatclub.com/forum/math-polygons-87336.html
http://gmatclub.com/forum/competition-for-the-best-gmat-error-log-template-86232.html

Kudos [?]: 766 [0], given: 17

Director
Joined: 01 Apr 2008
Posts: 872

Kudos [?]: 860 [0], given: 18

Name: Ronak Amin
Schools: IIM Lucknow (IPMX) - Class of 2014

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01 Apr 2009, 04:36
s = 450/t ---(1)
s+5 = 450/t-1---(2)

Subsitute s in 2, and we get t=10 or t=-9 ( not possible)
So t=10 => s = 450/10 = 45.

Kudos [?]: 860 [0], given: 18

Re: Speed..............   [#permalink] 01 Apr 2009, 04:36
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