A delivery van travels a total distance of 180 km. The entire journey takes 4 hours4\text{ hours}4 hours. The highest speed recorded during the journey is 80 km/h, and the lowest is 40 km/h.
What is the average speed for the journey?
40 km/h40\text{ km/h}40 km/h
45 km/h45\text{ km/h}45 km/h
60 km/h60\text{ km/h}60 km/h
80 km/h80\text{ km/h}80 km/h
204 exam-style questions on CIE IGCSE Physics Motion, covering Motion. Each one has a worked solution and a mark scheme showing where the marks go.