Question

A car travels 30 km at a uniform speed of 40 km/h and next 30 km at a uniform speed of 20 km/h. Find its average speed

Answer 1

Here is your answer....


S1=40km/hr.
D1=30km.

Hence,time T1= D/T
=30/40hr..

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Total distance =D1+D2=30+30=60

Total time =T1+T2=30/40+30/20 =9/4hr

Hence, Average speed=total distance/total time

60*9/4 =60*4/9

=26.67m/hr.


Hope it will help you..

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