Question

Train ‘D’ is travelling with a speed of 60 km/hr and crosses a vertical pole in 6 seconds. Train ‘E’ is 36 metres longer than ‘D’ and travelling with a speed 1/5th less than that of train 'D'. In how much time train E can cross a 144 metres long platform?

A 21 sec
B 18 sec
C 19 sec
D 20 sec
E None of these
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