Question

A car moves with a speed of 30 km/h–1

for half an hour, 25 km/h–1

for one hour

and 40 km/h–1

for two hours. Calculate the average speed of the car.​

Answer 1

Explanation:

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Answer 2

=34.286km/h

Explanation:

Average speed = totaltime/totaldistance

The distance covered=30×1/2 +25×1+40×2=120km

Time taken=0.5+1+2=3.5h

Hence,

Average speed= 3.5/120 =34.286km/h