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# M70-16

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Math Expert
Joined: 02 Sep 2009
Posts: 58453

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03 Sep 2018, 04:26
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Difficulty:

25% (medium)

Question Stats:

100% (01:08) correct 0% (00:00) wrong based on 5 sessions

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A train travels at a constant speed from town A to town D, passing through towns B and C on the way, in that order. If the entire trip takes 3 hours, how long does it take from town B to town C?

(1) From town A to town C takes the train 1 hour.

(2) From town B to town D takes the train 2.5 hours.

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Math Expert
Joined: 02 Sep 2009
Posts: 58453

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03 Sep 2018, 04:26
Official Solution:

We’ll go for LOGICAL because there is a logic to understanding the operator.

Statements (1) and (2) are clearly insufficient on their own, as they only give a larger section of which B to C is only a part. (A), (B) and (D) are eliminated. Combining them, we get an axis with the total time (3 hours), and 2 sections (A to C, B to D) which have an overlap (B to C) – and since we have 3 out of the 4 elements required to calculate, we can find the overlap!

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Re M70-16   [#permalink] 03 Sep 2018, 04:26
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# M70-16

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