Model trains move along a track passing through two model stations, A and B. Students analyse the motion of a model train. They start a digital timer as the train starts to move. They record the time it enters Station A and the time it enters Station B. It takes 
to enter station A and 
to enter Station B.
Calculate the time taken for the train to enter Station B from Station A. State your answer in seconds.
A faster train takes 
to travel from Station A to Station B. The distance between the stations is 
.Calculate the average speed of this train.
.
