A car travels a distance of 50 km / hr and returns with the speed of 80 km /hr find average speed of car
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average speed = 2v1v2 / v1 + v2
= 2 x 50 x 80 /(50+80 )
=8000 / 130
=61.5 km/ hr
= 2 x 50 x 80 /(50+80 )
=8000 / 130
=61.5 km/ hr
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