The separation between two towns is 600 km, correct to the nearest 10 km. A car needs 8 hours 40 minutes, correct to the nearest 10 minutes, to cover this distance.
(main)[3]
Calculate the lower bound of the car's average speed in km/h.
Worked solution & mark scheme
This 3-mark question has a full step-by-step worked solution and mark scheme. One marking point: “Final answer: $68$ (nfw)” …