#8 Problems on Trains

A train travelling at a speed of 75 mph enters a tunnel miles long. The train is mile long. How long does it take for the train to pass through the tunnel from the moment the front enters to the moment the rear emerges?

A) 2.5 minB) 3 minC) 3.2 minD) 3.5 min

Answer: B) 3 min 

Explanation:

Total distance covered =miles

=miles 

 

Time taken = hrs

= hrs

= min

= 3 min