+218 A train that is 4 km long is moving along a straight track toward a
tunnel that is 0.5 km long. If the train travels at 150 km/h, then the
number of minutes that the train takes to go through the tunnel is?
[150 km/h] / 60 minutes ==2.5 km/minute - speed of the train.
Length of the train + length of tunnel ==4 + 1/2 ==4 1/2 km - train must travel to emerge from the tunnel.
Time ==Distance covered / speed ==4.5 k / 2.5 km/m ==1.8 minutes - time it takes the train to go through the tunnel.
