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A car travels the first third of a dista...

A car travels the first third of a distance with a speed of 10 kmph, the second third at 20 kmph and the last third at 60 kmph. What is its mean speed over the entire distance?

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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 kmph. Determine the mean speed of the vehicle over the entire distance s.

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 kmph determine the mean speed of the vehicle over the entire distances.