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a worker in a city parks need to cover a circular path around the outside of a flower garden with gravel. the radius of the garden is 15 feet and the path surrounding the garden is 6 feet wide. how many square feet need to be covered with gravel? expalin how you arrived at your answer

  • math -

    You need to find the area of both circles. Then subtract the area of the inner circle from the outer circle.

    A = pi * r^2
    A = 3.14 * 15^2
    A = 3.14 * 225
    A = 706.5 square feet

    A = 3.14 * 21^2
    A = 3.14 * 441
    A = 1384.74 square feet

    1384.74 - 706.5 = ?

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