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## If A driver drives a car four times a lap 10,20 30,60 kmph.What is his average speed.

## Editorial / Best Answer

Answered by: bhaskar s p

avg speed for 2 speeds is 2*x*y/(x+y)

therefore avg of 2*10*20/(10+20) and

2*30*60/(30+60) which is equal to 20

its correct 20

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