A car travels a distance of 100 km. It travels first 15 km at a speed of 20 km/h, next 70 km at a speed of 30 km/h and remaining distance at a speed of 25 km/h. Calculate the average speed of the car.
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3
Answer:
avg speed = 7.2 ms-1
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4
Answer:
40 km/h
Explanation:
Average speed
total distance covered/total time taken
total distance covered=D=15+75+10=100km
total time taken=T=(15/30)+(75+50)+(10/20)
=2.5hrs
so, average speed=100/25=40km/hr
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