Nikhil drove his car with speed of 20 km/h while going to his college. When he returned to his home along the same route, the speed of the car is 30 km/h. Calculate the average speed of the car during his journey.
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Average speed of his journey is 24 km/h
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Hello Mate!
As we know that formulae of speed
Speed = d / t
20 km/h = d/t1
t1 = d / 20
30 km/h = d / t2
t2 = d / 30
Average Speed = Total d / Total t
= ( d + d ) / ( t1 + t2 )
= 2d / ( d/20 + d/30 )
= 2d / ( 3d + 2d ) / 60
= 2d / 5d × 60
= 24 km/h
Hope it helps☺!✌
As we know that formulae of speed
Speed = d / t
20 km/h = d/t1
t1 = d / 20
30 km/h = d / t2
t2 = d / 30
Average Speed = Total d / Total t
= ( d + d ) / ( t1 + t2 )
= 2d / ( d/20 + d/30 )
= 2d / ( 3d + 2d ) / 60
= 2d / 5d × 60
= 24 km/h
Hope it helps☺!✌
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