Question
Find the area of a circle whose diameter is: $5.6\ m.$

Answer

Let $r$ be the radius of the circle.
Then,$ r =\frac{5.6}{2}=2.8\text{m}.$
$\therefore$ Area of the circle $=\pi\text{r}^2$
$=\text{A}=\frac{22}{7}\times2.8^2\text{m}^2$
$=\text{A}=24.64\text{m}^2$

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