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The wheel of a cart is making 5 revoluti...

The wheel of a cart is making 5 revolutions per second. If the diameter of the wheel is 84 cm, find its speed in km per hour. [Take `pi=22/7`]

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Knowledge Check

  • The wheel of a cycle covers 660 metres by making 500 revolutions. What is the diameter of the wheel (in cm)?

    A
    42
    B
    21
    C
    30
    D
    60

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    A
    50 cm
    B
    60 cm
    C
    70 cm
    D
    80 cm

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