Get premium membership and access revision papers with marking schemes, video lessons and live classes.
Juma cycled for #2 1/2# hours to Mula Trading Centre, 30 km away from his home. He then took his business van and drove at an average speed of 80 km/h to a town 180 km away and back to Mula. He finally cycled home at an average speed of 15 km/h. Find the average speed for the whole journey.