A car travels 30 km at a uniform speed of 40 km/h and the next 30 km at an uniform speed of 20 km/h find its average speed
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v1= 40 km/h
v2= 30 km/h
v3= 20 km/h
total time taken T = 3 hour
average speed = v1+v2+v3 /T
=40+30+20 /3
=90/3
=30 km/h
the average velocity of car is 30 km/h
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