Question

Find the area of a circle whose diameter is 1.4 m

Answer 1

$$\begin{gathered} \mathrm{Given},\mathrm{diameter}\mathrm{of}\mathrm{circle}=1.4\mathrm{m} \\ \mathrm{So},\mathrm{radius}\mathrm{of}\mathrm{circle}=\frac{1.4}{2}=0.7\mathrm{m} \\ \mathrm{Now}, \\ \mathrm{Area}\mathrm{of}\mathrm{circle}={\mathrm{\pi r}}^2 \\ =\frac{22}{7}\times {\left(0.7\right)}^2 \\ =22\times 0.7\times 0.1 \\ =\mathbf{1}\mathbf{.}\mathbf{54}\mathbf{}{\mathbf{m}}^{\mathbf{2}} \end{gathered}$$