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18 August, 19:07

The wheel on Ed's chair has a radius of 30 cm. If he travels 540π cm, the wheel will rotate _?_ times.

A) 6

B) 9

C) 12

D) 18

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Answers (2)
  1. 18 August, 19:14
    0
    C = 2 * π * R

    C = 2 * π * 30

    C = 60π cm

    540π/60π = 54/6 = 9 times

    Answer: b) 9
  2. 18 August, 19:25
    0
    So travel distance of a wheele

    1 rotation distance=1 times circumverence so find circunference

    circumfernec=2 times radius times pi

    radius=30

    30 times 2 time spi=60pi

    so 60pi times x revolutions=540pi

    divide both sides by 60pi

    x revolutions=9

    9 revolustion

    B is the answer
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