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Speed & Distance

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Joined: 31 Jul 2017
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Kudos [?]: 17 [0], given: 333

Speed & Distance [#permalink]

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New post 17 Nov 2017, 02:05
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The Speed of a Car during the second hour of its Journey is thrice that in the first hour. Also, its third hours speed is the average speed of the first two hours. Had the car travelled at the second hour speed during all the first three hours, then it would have travelled 150 km more. Find the percentage reduction in time in the second case for the first three hours.

a) 33.33%
b) 40%
c) 25%
d) 50%
e) 30%
[Reveal] Spoiler: OA

Kudos [?]: 17 [0], given: 333

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Joined: 02 Sep 2009
Posts: 42607

Kudos [?]: 135666 [0], given: 12705

Re: Speed & Distance [#permalink]

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New post 17 Nov 2017, 07:48
rahul16singh28 wrote:
The Speed of a Car during the second hour of its Journey is thrice that in the first hour. Also, its third hours speed is the average speed of the first two hours. Had the car travelled at the second hour speed during all the first three hours, then it would have travelled 150 km more. Find the percentage reduction in time in the second case for the first three hours.

a) 33.33%
b) 40%
c) 25%
d) 50%
e) 30%


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Kudos [?]: 135666 [0], given: 12705

Re: Speed & Distance   [#permalink] 17 Nov 2017, 07:48
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