A boy while driving to his school covers at the average speed of 15km/h .On his return trip along the same route , covers at the average speed of 25km/h due to less traffic. What is his average speed for the whole trip?
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The average speed
Time =distance /speed
the speed of car first time is 15
And the speed between both has a difference of 10.
So average speed is 12.5
Time =distance /speed
the speed of car first time is 15
And the speed between both has a difference of 10.
So average speed is 12.5
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