Usha moving in the car at the speed of 40km/hr and cover 20km/h. She cover the next 20km/h at a speed of 60 km/h. Calculate the average Speed of the car
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Total distance=40+20+20+60=
=60+80
=140km
total time=1h+1h+1h+1h
=4h
Average speed = total distance /
total time
=140/4
= 35km/h
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