Question

Train ‘A’ running with a speed of 54 km/hr can cross a standing goods train of 4 times its length in 30 seconds. Find the time taken by 210 metres long train ‘B’ which is coming from opposite direction of train ‘A’, with a speed of 35 m/s, to cross train ‘A’.

A 15 seconds
B 5 seconds
C 6 seconds
D 7 seconds
E None of these
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