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Practice mode Time and Distance

A train passes a man standing on a platform in 9 seconds and passes the whole 240 m platform in 21 seconds. What is the length of the train?

Correct answer D. 180 m

Explanation

The extra 12 seconds cover the platform, so speed = 240 / 12 = 20 m/s. Length = 20 × 9 = 180 m.

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