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A motor vehicle travelled the first thir...

A motor vehicle travelled the first third of a distance s at a speed of `v_(1)=10` kmph, the second third at a speed of `v_(2)=20` kmph and the last third at a speed of `v_(3)=60` kmp. Determine the mean speed of the vehicle over the entire distance s.

A

15 kmph

B

12 kmph

C

10 kmph

D

18 kmph

Text Solution

Verified by Experts

The correct Answer is:
D
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