Question

While going to his shop, Manish drove his car at 30km/h . He returned to his home along the same route at a speed of 20km/h. Calculate average speed & average velocity of the car for the entire journey.





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Answer 1

Answer:

Let distance be d

Speed (1) = 20km/h

Time taken = distance / speed

= d/20

Speed (2) = 30km/h

Time = Distance/time

= d/30

Average speed = total distance /total time

=( d+d) /{(d/20)+(d/30)}

= 2d / (d/12)

=24d/ d

= 24

So, the average speed of the car was 24km/h

Explanation:

Answer 2

Answer:

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