-
Two trains 140 m and 160 m long run at the speed of 60 km/ hour and 40 km/hour respectively in opposite directions on parallel tracks. The time (in seconds) which they take to cross each other, is :
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- 10 sec.
- 10.8 sec.
- 9 sec.
- 9.6 sec.
Correct Option: B
Total length of trains
= 140 + 160 = 300 m.
Relative speed = 60 + 40 = 100 kmph
| = 100 × | m/sec. | |
| 18 |
| or | m/sec. | |
| 9 |
∴ Time taken to cross each other
| = | |||||
| 9 | |||||
| = | = 10.8 sec. | |
| 250 |
