Two trains, each 250 m in length, are running on parallel lines in opposite directions at speeds of 90 km/h and 60 km/h respectively. In how many seconds will they cross each other completely?
12 seconds
The correct answer is Option 2 i.e. 12 seconds.
Length of each train = 250 m
Total length to cross = 250 + 250 = 500 m
Speeds = 90 km/h and 60 km/h
Relative speed = 90 + 60 = 150 km/hr
⇒ 150 × 5/18 = 750/18 m/sec
Time = 500/(750/18) = (500 × 18)/750 = 12 seconds
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Important Questions from Problem on Trains
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If the route between G and C is closed, which one of the following stations need not be passed through while travelling from H to C?
A daily train is to be introduced between station A and station B starting from each end at 6 AM and the journey is to be completed in 42 hours. What is the number of trains needed in order to maintain the Shuttle Service?
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