Question

Train ‘A’ of length 150 metres crosses a platform of length 250 meters in 20seconds. If the ratio of the speed of train ‘A’ to that of train ‘B’ is 5:7, then find (1/5)th of the length (in metres) of train ‘B’ given that train ‘B’ can cross a pole in 10 seconds.

A 84 metres
B 102 metres
C 66 metres
D 56 metres
E none of these
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