Question

A car moves 1/3 distance with speed 20 km/hr and 2/3 with 60km/hr .average speed is

Answer 1

average speed =v2-v1
=60-20
average speed= 40km/hm..

thanks jazakallah

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Answer 2

average speed= Total distance /total time
=1/60hr+90hr
=1/150km/hr