21-06-2021
Mathematics

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The area of a circle is 64 pi ft squared. What is the circumference, in feet? Express your answer in terms of pi

The area of a circle is 64 pi ft squared What is the circumference in feet Express your answer in terms of pi class=

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21-06-2021

Circumference of a circle of radius
r
is given by
2
π
r
and area is
π
r
2
.
As
2
π
r
=
64
π
i.e.
r
=
64
π
2
π
=
64
2
=
32
,
Hence, area is
π
(
32
)
2
=
1024
π

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