Claire drove from Manchester to London, it took her 4 hours at an average speed of 85 km/h. Matt drove from Manchester to London, it took him 5 hours. Assuming he took the same route as Claire and took no breaks, work out his average speed in km/h.
Distance = 4 x 85 = 340km
Average speed = 340 / 5 = 68 km/h
FH
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