Question

area of a circular lawn is 154 m, find its circumference.​

Answer 1

Answer:

$\pi {r}^{2} = 154 \\ {r}^{2} = \frac{154}{\pi} \\ {r}^{2} = \frac{154 \times 7}{22} \\ {r}^{2} = 7 \times 7 \\ r = 7 \\ \\ circumferece \\2\pi r = 2 \times \frac{22}{7} \times 7 \\ = 44m$