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Joe and Bill drove separate cars along the entire length of a certain

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Joe and Bill drove separate cars along the entire length of a certain [#permalink]

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New post 05 May 2017, 03:43
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Joe and Bill drove separate cars along the entire length of a certain route. If Joe made the trip in 12 minutes, how many minutes did it take Bill to make the same trip?

(1) Joe's average speed for the trip was 5/6 of Bill's average speed
(2) The route is 16 miles long.
[Reveal] Spoiler: OA

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Joe and Bill drove separate cars along the entire length of a certain [#permalink]

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New post 05 May 2017, 04:06
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(1) reverse relationship between speed and time, then if Joe's speed was 5/6 Bill's speed then Bill spent 5/6 time Joe did.
6/5*(Bill's time)=12
hence
5/6 * 12 = 10 minutes, Sufficient.
(2) Here we can only calculate Joe's speed, Insufficient

Answer A
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Re: Joe and Bill drove separate cars along the entire length of a certain [#permalink]

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New post 07 May 2017, 09:24
speed and time are inversely proportional,,with this base lets solve,,

stat1 : if Joe's speed is 5/6 Bill's speed then Bill spent 5/6 of the time Joe did...suff

stat 2: not usuff

ans A
Re: Joe and Bill drove separate cars along the entire length of a certain   [#permalink] 07 May 2017, 09:24
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