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

172 views

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?

posted Aug 14, 2014

213.75 seconds

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

Similar Puzzles

A 275 yard long train, travelling at 60 mph, enters a tunnel of two 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?

A 110 mtr long train, travelling at 50 kmph enters a two km long tunnel.

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?

A 110 yard long train, travelling at 80 mph, enters a tunnel of half a mile in length.

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?