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

Text Solution

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18 kmph
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Knowledge Check

  • A vehicle travels half the distance (L) with speed V_1 and the other half with speed V_2 , then its average speed is .

    A
    a. `v_1 + v_2/2`
    B
    b. `2v_1 + v_2/v_1 + v_2`
    C
    c. `2v_(1)v_2/(v_1 + v_2)`
    D
    d. `(v_1 + v_2)/v_(1)v_(2)`

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