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  1. Two trains A and B travel from points X to Y and the ratio of the speeds of A to that of B is 2 : 7. Find the ratio of time taken by A and B to reach From X to Y.
    1. 2 : 5
    2. 3 : 5
    3. 3 : 8
    4. 7 : 2
Correct Option: D

We know that speed is inversely proportional to time.
Given that, (Speed of A ) : (speed of B ) = 2 : 7
∴(Time taken by A ) : (Time taken by B ) = 1/2 : 1/7 = 7 : 2


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