Question

Train ‘A’ running with a speed of 45 km/h crosses a pole in 7.5 seconds. If the time taken by train ‘A’ to cross train ‘B’ running with a speed of 54 km/h and coming from the opposite direction is 9 seconds, then find the length of train
B.

A 123.75 metres
B 143.75 metres
C 153.75 metres
D 113.75 metres
E None of these
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