Average Speed
Classical Mechanics
Level
2
A car travels a distance from A to B at a speed of 40 km/hr (U) and returns at a speed of 30 km/hr (V). What is its average speed (in km/hr) for the whole journey?
The answer is 34.3.
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1 solution
Let the distance from A to B be x.Time taken while moving from A to B x/40 and from B to A is x/30.Average speed =x+x/total time.