Answer:
Radius = Diameter/2 = 21/2 = 10.5 cm. Now,we have to calculate the area of the circle by using the following mathematical formula,. Area of the circle by using the following mathematical formula
Area of the circle =
[tex]\pi \times {r}^{2} = \frac{22}{7} \times 10.5 \times 10.5 = 346.5 {cm}^{2} [/tex]
[tex]so \: the \: answer \: is \: 346.5 {cm}^{2} [/tex]
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