A train 240 m long is running at a speed of 88 km/h. In what time will it pass a man who is running at a speed of 16 km/h in the same direction?

Correct option is B

Given:
Length of the train = 240 m
Speed of the train = 88 km/h
Speed of the man = 16 km/h
Formula Used:
Relative Speed = Speed of the train - Speed of the man (since both are moving in the same direction)
​$$\text{Time taken} = \dfrac{\text{Distance}}{\text{Relative Speed}}$$​​
Solution:
Relative Speed = $$(88- 16 ) \times \frac 5 {18}$$ = 20 m/sec

Distance to be covered = Length of the train = 240 m
Time taken = $$\frac{240}{ 20}$$​= 12 seconds