Question

the area of a circular lawn is 154m²find its circumference. ​

Answer 1

ANSWER

Area of circular lawn = 154 m square.

$area \: = \pi \: r {}^{2} \\ 154 = 22 \div 7 \times r {}^{2} \\ 154 \times 7 = 22 \times r {}^{2} \\ 154 \times 7 \div 22 = r { }^{2} \\ r { }^{2} = 49 \\ r = 7. \\ circumference = 2 \: \pi \: r \\ = 2 \times 22 \div 7 \times 7 \\ = 44m$

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