Question

find the area of a circle whose diameter is 21 cm
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Answer 1

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Answer 2

Answer:

Your ans is 346.5cm

area of circle is = πr²

diameter = 2r

21=2r

r=21/2

r=10.5cm

now we have radius so

area of circle is πr²

=22/7 x 10.5 x 10.5

=22/7 x 110.25

=22 x 15.75

=346.5 cm²

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