Question

A Fast Passenger train 120 m long passes a man, running at 6 kmph in the direction opposite to that of the train, in 9 seconds. The speed of the
train is-
42 km/hr
66 km/hr
54 km/hr
72 km/hr
​

Answer 1

Step-by-step explanation:

Speed of the train relative to man =(120/9)m/sec

(120/9×18/5)kmph=48 kmph

Let the speed of the train be x kmph Then, relative speed = (x + 6) kmph. x + 6 = 48 or x = 42 kmph.