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The Speed of a Car during the second hour of its Journey is thrice

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Manager
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Joined: 31 Jul 2017
Posts: 119

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

The Speed of a Car during the second hour of its Journey is thrice [#permalink]

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New post 17 Nov 2017, 07:06
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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

Manager
Manager
avatar
B
Joined: 31 Jul 2017
Posts: 119

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

Re: The Speed of a Car during the second hour of its Journey is thrice [#permalink]

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New post 17 Nov 2017, 07:08
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%


Hi All,

Can you please help me to solve this question. Had earlier posted this question in Quant PS section but dont know how it disappeared.

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

Re: The Speed of a Car during the second hour of its Journey is thrice   [#permalink] 17 Nov 2017, 07:08
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The Speed of a Car during the second hour of its Journey is thrice

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