Question

Train 'A' having a speed of 20 m/s can cross a man in 7 seconds. The length of train 'B' is 40 metres more than the length of 'A'. If the speed of 'B' is 30 m/sec and both trains are travelling towards each other, then find the time taken by them to cross each other.

A 5.4 seconds
B 5.9 seconds
C 6.4 seconds
D 6.9 seconds
E 7.4 seconds
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