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Question

Two express trains of equal length are running on parallel lines in the same direction at 92 kmph and 72 kmph. If the faster express train passes the slower express train in 72 seconds, then what is the length of each express train?


A

200 meter

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B

180 meter

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C

160 meter

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D

144 meter

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E

None of these

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Solution

The correct option is A

200 meter


Assume the length of each train = x

Total distance covered for overtaking the slower train = x+x = 2x

Relative speed = 92 - 72 = 20 kmph = 50/9 m/s

Time = 72 seconds

2x509 = 72 => x = 200 meter


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