A train which is travelling at 80 km hr meets another train travelling in same direction and then le...........

Quantitative Aptitude ( CCS) Problems on trains

A train which is travelling at 80 km/hr meets another train travelling in same direction and then leaves it 150 m behind in next 20 seconds. Find the speed of the second train.

72 km/hr

53 km/hr

64 km/hr

59 km/hr

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Explanation:

Solution:
Let speed of the 2nd train is s m/sec.
80 km/hr = (80*5)/18 = 200/9 m/sec.
Trains are travelling in same direction. So
(200/9) – s = 150/20
Solve, s = 265/18 m/sec = 265/18 * 18/5 = 53 km/hr