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Train A leaves the station at 5:00, and travels north at 50 miles per

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Train A leaves the station at 5:00, and travels north at 50 miles per [#permalink]

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New post 17 May 2017, 10:33
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Question Stats:

80% (00:52) correct 20% (01:06) wrong based on 60 sessions

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Train A leaves the station at 5:00, and travels north at 50 miles per hour. If train B leaves the same station some time later, heading in the same direction as train A, at what time will train B overtake train A?

(1) Train B leaves the station at 6:00.
(2) Train A travels at 5/6 the speed of train B.
[Reveal] Spoiler: OA

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Re: Train A leaves the station at 5:00, and travels north at 50 miles per [#permalink]

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SajjadAhmad wrote:
Train A leaves the station at 5:00, and travels north at 50 miles per hour. If train B leaves the same station some time later, heading in the same direction as train A, at what time will train B overtake train A?

(1) Train B leaves the station at 6:00.
(2) Train A travels at 5/6 the speed of train B.


To solve the question we need two information - 1) at what time train B leaves the station and 2) what is train B's speed

Statement 1: it provide the time when B leaves the station but does not provide information regarding B's speed. hence insufficient

Statement 2: it provides speed of train B but provides no information regarding the time when train B leaves the station. Hence insufficient

Combining 1 & 2 we get both the requirements to solve the question.

Hence option C
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Re: Train A leaves the station at 5:00, and travels north at 50 miles per [#permalink]

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New post 19 May 2017, 00:31
Information required:
(1) Time of departure of Train B
(2) Speed of Train B

Statement:1 Gives the departure time of Train B
Statement:2 Gives the speed of Train B
(1)&(2)
Both statements are required to solve the question.

Answer: C.

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Re: Train A leaves the station at 5:00, and travels north at 50 miles per   [#permalink] 19 May 2017, 00:31
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Train A leaves the station at 5:00, and travels north at 50 miles per

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