Question 69

A train 300 m long is running at a speed of 90 km/hr. How many seconds will it take to cross a 200 m long train running in the opposite direction at a speed of 60 km/hr ?

Solution

Time taken = Sum of length of trains/ Relative speed

Sum of length = 200 + 300 = 500

Relative speed = Addition of the two speeds, since trains travelling in opposite direction.

t = 500/(90+60)*5/18

t = 12 seconds

Hence C

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