A circular swimming pool has a radius of 20 feet of fence is going to be built So that there is a 4 foot space around the entire pool what i

Question

A circular swimming pool has a radius of 20 feet of fence is going to be built So that there is a 4 foot space around the entire pool what is the length of the fence Cynthia solve the problem as shown what was her error

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Aubrey 2 weeks 2021-11-17T16:38:30+00:00 1 Answer 0 views 0

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    2021-11-17T16:40:12+00:00

    Answer:

    The length of the fence is 45.09ft

    Step-by-step explanation:

    To solve this exercise we first have to calculate the radius of the pool and then add the 4 foot we want to distance it.

    r = radius

    π = 3.14

    c =  circumference = 20ft

    c = π * 2r

    we clear r

    r = c / 2π

    now we replace the values ​​we know

    r = 20ft / 2 * 3.14

    r = 3.18ft

    now we add the 4 feet we want away

    3.18ft + 4ft = 7.18ft

    r = 7.18ft

    c2 = π * 2r

    c2 = 3.14 * 2 * 7.18

    c2 = 45.09ft

    The length of the fence is 45.09ft

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45:7+7-4:2-5:5*4+35:2 =? ( )