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26 March, 07:10

The circumference of a circular swimming pool is 100 feet. If the radius of the pool is doubled, what will the new circumference be?

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  1. 26 March, 07:25
    0
    The new circumference is 200
  2. 26 March, 07:36
    0
    Circumference, C = 2πr

    Solve for r

    C = 2πr

    100 = 2πr

    100/2π = r

    15.92 ft = circumference of circle with C = 100ft

    Doubled radius

    15.92 (2) = 31.83 ft = new radius

    C of new circle = 2πr

    C = 2π (31.83)

    [C = 200 ft]

    = Circumference of new circle with doubled radius.
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