a motorcycle drives from place A to B with a uniform speed of 30km h-1 and returns from place B to A with a uniform speed of 20km h-1. Find his average speed.
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Here we can use the formula:2V1V2/V1+V2
where V1 =speed from A to B and V2=speed from B to A
so, average speed=2x30x20/20+30=24Kmph
where V1 =speed from A to B and V2=speed from B to A
so, average speed=2x30x20/20+30=24Kmph
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