Answers

2015-03-18T21:57:11+05:30
The whole train needs to travel the tunnels length of 5 miles, plus another mile for it to completely pass the tunnel because it is 1 mile long.

Speed of the train = 60mph = 1m/min
Total distance to be covered = 5 + 1 = 6 (5 miles for the tunnel and an extra mile for the train to pass the tunnel) 
Thus time taken = Distance/speed 
= 6/1
= 6 mins

Hope that helps !!
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