Question

find the area and circumference of the circle whose radius is 21cm​

Answer 1

Step-by-step explanation:

Given, radius r=21cm and π=

7

22

Then,

Area of the circle = πr

2

sq units

=

7

22

×21×21

=22×3×21

=1386cm

2

Answer 2

circumference of circle= 2πr=2×22/7×21=132cm

area of circle= πr²=22/7 × 21×21= 1386cm²

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