A train 110 metres in length travels at 60 km/hr.In what

A train 110 metres in length travels at 60 km/hr.In what time will it pass a man which is walking against the train at 6 km an hour?

∵ Relative speed of the train = 60 + 6 = 66 km/hr
= 66 x 5/18 m/sec = 55/3 m/sec

∴ Required time = 110 x (3/55) = 6 sec