Question

Train 'M' can cross a pole in 10 seconds and a 200 metres long bridge in 15 seconds. Train 'N' whose length is 50% of the length of train 'M' runs in the same direction of train 'M'. If train 'N' crosses train 'M' in 15 seconds, then find the speed of train 'N'.

A 72 m/s
B 76 m/s
C 80 m/s
D 84 m/s
E 88 m/s
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