(a(i))[1]
Calculate the car's acceleration in the first 18 seconds.
(a(ii))[4]
Calculate the bus's constant speed, $v$.
(b)[3]
Calculate the train’s average speed. Express your answer in kilometres per hour.
Mathematics 0580 · IGCSE · Graphs in practical situations
Graphs in practical situations — practice question
The diagram presents the speed-time graph for part of a journey involving two vehicles, a car and a bus. The bus moves with constant speed $v$. The car accelerates uniformly from 10 m/s at $t=0$ to 24 m/s at $t=18$ seconds, and then continues at constant speed up to $t=40$ seconds. The diagram is labelled NOT TO SCALE.