A train 110 metres long is running with a speed of 60 kmph. In what time will it pass a man who is running at 6 kmph in the direction opposite to that in which the train is going?

(a) 5 sec

(b) 6 sec

(c) 7 sec

(d)10 sec

Explanation:

Speed of train relative to man = (60 + 6) km/hr = 66 km/hr.

= (66 x 5/18) m/sec

= (55/3) m/sec.

Time taken to pass the man = (110 x 3/55) sec = 6 sec.