(a)[1]
A train departs station $A$ at $07\,43$. It reaches station $B$ at $10\,27$. Calculate the length of time the train spends travelling from station $A$ to station $B$.
(b)[3]
A bus departs from the bus station at $06\,25$. It gets to the airport at $07\,05$. The distance from the bus station to the airport is $24\text{ km}$. Calculate the average speed of the bus for this trip. Give your answer in km/h.