Question 32

A train ‘A’ of 180 metres is running at the rate of 72 km/hr. Another train ‘B’ of 120 metres is coming from opposite direction is the rate of 108 km/hr. How long will they take to cross one another ?

Solution

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Speed of the train A = 72 * 5 /18 = 20 m/s

Speed of train B = 108 * 5/18 = 30 m/s

Total time to cross each other = total distance / total speed

= 300/50 = 6 seconds

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