How many seconds will elapse between the moment the front of the train enters the tunnel and the ...........

Question

A 440 yard long train, travelling at 80 mph, enters a 4.5 mile long tunnel.

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

Answer 1

213.75 seconds

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Distance = 4.5 miles +440 yard= 4.5 miles +440/1760 miles= 4.75 miles
Speed = 80 m/hr = 80/3600 m/sec= 1/45 m/sec
Time = 4.75/1/45= 213.75 sec