# A 225 m long train is running at a speed of 30 km/hour

Time Distance
A 225 m long train is running at a speed of 30 km/hour. How much time does it take to cross a man running at 3 km/hour in the same direction?

- 40 seconds
- 30 seconds
- 25 seconds
- 15 seconds

### Answer

Since the train and man are running in the same direction, the relative speed of train w.r.t. man is

Speed = 30 - 3 = 27 km/hr = 7.5 m/s

Distance = 225 m

Time = Distance / Speed = 225/7.5

Time taken by train = 30 seconds

**The correct option is B.**