Question:
Two trains are moving in opposite directions @ 60 km/hr and 90 km/hr. Their lengths are 1.10 km and 0.9 km respectively. The time taken by the slower train to cross the faster train in seconds is:
[A].36
45
48
49
Two trains are moving in opposite directions @ 60 km/hr and 90 km/hr. Their lengths are 1.10 km and 0.9 km respectively. The time taken by the slower train to cross the faster train in seconds is:
[A].
[B].
[C].
[D].
Answer: Option C
Explanation:
Relative speed = (60+ 90) km/hr
| = | 150 x | 5 | m/sec | |
| 18 |
| = | 125 | m/sec. | |
| 3 |
Distance covered = (1.10 + 0.9) km = 2 km = 2000 m.
| Required time = | 2000 x | 3 | sec = 48 sec. | |
| 125 |