Question

the area of a circle is 9 22_7cm2 its circumference​

Answer 1

Let the Circumference be X.

According to the given formula,

${x}^{2} = 4\pi { (\frac{22}{7} )}^{2} \\ {x}^{2} = 4( \frac{22}{7} ) {( \frac{22}{7} )}^{2} = 4 {( \frac{22}{7} )}^{3} \\ {x}^{2} = \frac{4 \times10648 }{343} = 4 \times 31.0437 \\ {x}^{2} = 124.1748 \\ x = \sqrt{124.1748} = 11.1433 ≈ 12cm$