Question:
A passenger train 150m long is travelling with a speed of 36 km/ hr. If a man is cycling in the direction of train at 9 km/hr., the time taken by the train to pass the man is
A10 sec
B15 sec
C18 sec
D20 sec
Answer:
D. 20 sec
Explanation:
Length of the train= 150 meter Speed of the train= 36 km/hr Speed of the man = 9 km/hr Relative speed = 36 - 9 = 27 km/hr { since the train and the man are in same direction} = 27 × 5/18 m/s = 15/2 m/s Time= distance/ speed = 150/(15/2) = 20 second