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# During a trip on an expressway, Don drove a total of x

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Manager
Joined: 08 Feb 2006
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During a trip on an expressway, Don drove a total of x [#permalink]

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20 Apr 2006, 20:54
This topic is locked. If you want to discuss this question please re-post it in the respective forum.

During a trip on an expressway, Don drove a total of x miles. His average speed on a certain 5 mile section of the expressway was 30 miles per hour, and his average speed for the remainder of the trip was 60 miles per hour. His travel time for the x mile trip was what percent greater than it would have been if he had traveled at a constant rate of 60 miles per hour for the entire trip?

a. 8.5%

b. 50%

c. x/12%

d. 60/x%

e. 500/x%
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Joined: 20 Mar 2005
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Re: Expressway [#permalink]

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20 Apr 2006, 21:05
jlui4477 wrote:
During a trip on an expressway, Don drove a total of x miles. His average speed on a certain 5 mile section of the expressway was 30 miles per hour, and his average speed for the remainder of the trip was 60 miles per hour. His travel time for the x mile trip was what percent greater than it would have been if he had traveled at a constant rate of 60 miles per hour for the entire trip?

a. 8.5%

b. 50%

c. x/12%

d. 60/x%

e. 500/x%

I would say E.

T1 = (x-5)/60 + 5/30
T2 = X/60

T1/T2 - 1 = 5/X
Senior Manager
Joined: 08 Sep 2004
Posts: 257
Location: New York City, USA
Followers: 1

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20 Apr 2006, 21:43
Agree with E.

- Vipin
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[#permalink]

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14 Aug 2006, 08:28
!   [#permalink] 14 Aug 2006, 08:28
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# During a trip on an expressway, Don drove a total of x

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