Two trains are running in opposite direction with same speed. If length of each train is 120m and they cross each other in 12 seconds. Then the speed of each train is?
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Distance covered = 120+120 = 240 m
Time = 12 s
Let the speed of each train = v. Then relative speed = v + v = 2v
2v = distance/time = 240/12 = 20 m/s
Speed of each train = v = 20/2 = 10 m/s
= 10 × 36/10 km/hr = 36 km/hr
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