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A 500 yard long train, travelling at 90 mph, enters a tunnel of four and a half miles in length. How long will.........

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A 500 yard long train, travelling at 90 mph, enters a tunnel of four and a half miles in length.

How long will elapse between the moment the front of the train enters the tunnel and the moment the end of the train clears the tunnel?

posted Jul 31, 2018 by Aman

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1 Answer

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3.19 minutes


1 mile= 1760 yards, 500 yards= 500/1760 ~ 0.285 miles
Tunnel + train= 4.5+0. 285= 4.785 miles
Time to clear tunnel = 4.785 /90=0.053167 hr = 3.19 mins

answer Jul 31, 2018 by Hanifa Mammadov



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