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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 distances.

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18 kmph
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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)=20kmph and the last third at a speed of v_(3)=60kmph Determine the mean speed of the vehicle over the entire distances .

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

Knowledge Check

  • 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_(1)=60 kmph. Determine the mean speed of the vehicle over the entire distance s.

    A
    15 kmph
    B
    12 kmph
    C
    10 kmph
    D
    18 kmph

  • A vehicle covers first half of its total distance at a speed 20 kmph. and the other half of the distance at 40 kmph. The mean speed over the entire distance.

    A
    30 kmph
    B
    50 kmph
    C
    `40/3` kmph
    D
    `80/3` kmph

  • A vehicle covers first half of its total distance at a speed 20 kmph. And the other half of the distance at 40 kmph. The mean speed over the entire distance.

    A
    30 kmph
    B
    50 kmph
    C
    `(40)/(3)` kmph
    D
    `(80)/(3)` kmph

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