A car travels a distance A to B at a speed of 56 km/h and returns to A at a speed of 72 km/h. (1) What is the average speed for the whole journey? (ii) What is the average velocity?
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Explanation:
speed of car from A to B = 56km/h
speed of car form B to A = 72km/h
Total distance/time = 128km/2h
Average speed = Total distance / total time
= 128/2
= 64km/h.
sorry I don't know how to calculate velocity:(
hope this helps :)
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