[Figure 20.1 - A distance-time graph showing the journey of a red bus. The y-axis is 'Distance from village (km)' (0-25). The x-axis is 'Time' (11:00-12:00). The graph shows segments of travel and stops.] The distance-time graph shows the journey of a red bus travelling from a village to a town.

1. (a)Find the total length of time for which the bus is stopped during the journey.[1]
2. (b)Find the average speed of the bus over the whole journey from the village to the town.[1]
3. (c)(i)A yellow bus leaves the town at 1125 and travels non-stop along the same road to the village at a constant speed of 50km/h. On the graph draw the distance-time graph for the yellow bus.[1]
4. (c)(ii)At what time does the yellow bus meet the red bus?[1]

This question uses a diagram from the original paper, which isn't shown here. Open the full paper from the past papers archive to see it.