A 1 km long train travelling at a speed of 60km/h enter a tunnel 1km long. What time will the train take to come out of the tunnel fully.
+23245
Picture the train's engine just entering the tunnel.
One km later the train's engine will just be leaving the tunnel while the rear of the train is just entering the tunnel.
Then, one km later the rear of the train will be just leaving the tunnel.
So, the train will have to travel two km.
D = R x T ---> 2 km = 60 km/hr x time ---> time = 2 / 60 hr.
