-
Two trains are running with speed 30 km/hr and 58 km/hr in the same direction. A man in
the slower train passes the faster train in 18 seconds. The length (in metres) of the faster train is :
-
- 70
- 100
- 128
- 140
Correct Option: D
Relative speed = (58 – 30) km/hr
| = |  | 28 × |  | m/sec. | |
| 18 |
| = | m/sec. | |
| 9 |
| ∴ Length of train = | × 18 | |
| 9 |
= 140 metres
