The distance between a man and a 230 m long train is 115 m. How much time (in seconds) will the train, which is running at a speed of 60 km/h, take to pass the man who is running at a speed of 9 km/h towards the train?
Show answer & explanation
Correct answer: D
Explanation
The correct answer is option 4 i.e. 18
Given:
Distance between man and train = 115 m
Length of train = 230 m
Speed of train = 60 km/h
Speed of man = 9 km/h
Formula used:
Speed = Distance/time ---- (1)
Calculations:
Total distance = 230 + 115 = 345 m
Relative speed will be the sum of the speed of train and man
Relative speed = 60 + 9 = 69 km/h
Speed in m/s = 69 × (5/18) = 115/6 m/s
Required time taken = 345/(115/6)
= 18 seconds