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Question

How much time did X take to reach the destination? I. The ratio between the speed of X and Y is 3:4. II. Y takes 36 minutes to reach the same destination.

A
I alone sufficient while II alone not sufficient to answer.
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B
II alone sufficient while I alone not sufficient to answer.
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C
Either I or II alone sufficient to answer.
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D
Both I and II are necessary to answer.
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Solution

The correct option is D Both I and II are necessary to answer.Since ratio of speed of X : Y is 3 : 4, then ratio of time will be 4 : 3. I. If Y takes 3 min, then X takes 4 min. II. If Y takes 36 min, then X takes (43×36) = 48 min. Thus, I and II together give the Ans. ∴ Correct Ans is (D).

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