Problems on trains

Quantitative Aptitude (CCS)

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Two trains of length 150 m and 120 m are travelling at the rate of 75 km/hr and 45 km/hr respectively. Time taken by the trains to cross each other if they travel in opposite direction is ?

81 sec.

28.4 sec.

8.1 sec.

32.4 sec

Explanation:

Total Distance to be covered = 150 + 120 = 270 m

Relative Speed = 75 + 45 = 120 km/hr = 120 * 5/18 m/sec

Time taken = D/S = 270/(120 * 5/18)

= 270 * 18/120*5 = 8.1 sec

By: Deepak Dawra

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