# What is the Speed of the Train? If

A 120 mts long train crosses a tree in 6 seconds. What is the speed of the train in kilometer per hour?

- 60 km/hr
- 75 km/hr
- 90 km/hr
- 72 km/hr

**Answer: (4) 72 km/hr**

**Explanation:-**

The length of the train = 120 m

Time taken by train to crosses a tree = 6 sec

Then, the speed of the train = 120/6

= 20 m/sec

Speed in km/hr = 20 x 18/5

= 4 x 18

= 72 km/hr

Hence, the answer is (4) 72 km/hr.