Question

The area of a circular lawn is 154m²,find its circumference

Answer 1

hope it will help you

Answer 2

$area = \pi \times {r}^{2} \\ area = 154 {m}^{2} \\ \pi \times {r}^{2} = 154 {m}^{2} \\ 22 \times {r}^{2} \div 7 = 154 {m}^{2} \\ {r}^{2} = 154 {m}^{2} \times 7 \div 22 \\ {r}^{2} = 49 {m}^{2} \\ \sqrt{ {r}^{2} } = \sqrt{49 {m}^{2} } \\ r = 7m \\ circumference(c) = 2 \times \pi \times r \\ c = 2 \times 22 \div 7 \times 7 \\ c = 2 \times 22 \\ c = 44m$
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