# Find the Length of the Faster Train.

Two trains are travelling in the same direction with speed of 30 km/hr. and 58 km/hr. respectively. A man in slower train passes the faster train in 18 sec. Find the length of the faster train.

- 70 m
- 140 m
- 100 m
- 120 m

**Answer: (b) 140 m
Explanation:-
**Relative speed = 58- 30 = 28 km/hr

Speed in m/sec = 28 x 5/18 = 140/ 18

Length of the faster train = 140x 18/18

= 140 mitres