Vishwanath
Monday, February 18, 2013
42. | Two trains 140 m and 160 m long run at the speed of 60 km/hr and 40 km/hr respectively in opposite directions on parallel tracks. The time (in seconds) which they take to cross each other, is:
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Answer: Option D
Explanation:
Relative speed = (60 + 40) km/hr = |
| 100 x | 5 | m/sec | = |
| 250 | m/sec. |
18 | 9 |
Distance covered in crossing each other = (140 + 160) m = 300 m.
Required time = |
| 300 x | 9 | sec | = | 54 | sec = 10.8 sec. |
250 | 5
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Title : Trains Q42
Description : 42. Two trains 140 m and 160 m long run at the speed of 60 km/hr and 40 km/hr respectively in opposite directions on parallel tracks. The ti...
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