Question

Train A when travelling with a speed of 144 km/h crosses a pole in 6 seconds. Find the time taken by the train A to cross another train B of length 25% more than that of train A which is coming from the opposite direction with a speed of 126 km/h.

A 6.8 seconds
B 7.2 seconds
C 7.5 seconds
D 8 seconds
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