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22 April, 22:11

A circular flower bed is 15 m in diameter and has a circular sidewalk around it that is 3 m wide. Find the area of the sidewalk in square meters. Use 3.14 for pi π.

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  1. 23 April, 02:04
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    346.19 m²

    Step-by-step explanation:

    The diameter of the circular flower bed is 15 m and the length of the sidewalk round the flower bed is 3 m.

    This means that an extra length of 3 m is added on each side.

    The joint diameter of the flower bed and sidewalk is:

    15 + 3 + 3 = 21 m

    The radius is half of the diameter, that is 10.5 m

    The area of the sidewalk is therefore:

    A = pi * r²

    Where r = radius

    A = 3.14 * 10.5²

    A = 346.19 m²
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