Question

A train is 300 metres long moving at a speed of 73.5 km/hr, passes a child walking in the same direction of the train with a speed of 1.5 km/hr. Find the time taken by the train to cross the child.

• A. 10 sec
• B. 15 sec
• C. 25 sec
• D. 30 sec

Answer 1

The correct option is B 15 sec

Relative speed of the train and child $=73.5-1.5=72$ km/hr $=72\times \frac{5}{18}=20$m/sec

So the time taken by the train to pass the child $=d/s=\frac{300}{20}=15$sec.