Question

Find the circumference of circle
whose area as 6.16 cm sq


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Answer 1

Answer:

Area =6.16cm sq

$22 \div 7 \times {r}^{2} = 6.16$

${r}^{2} = \frac{6.16 \times 7}{22}$

${r}^{2} = \frac{0.56 \times 7}{2}$

${r}^{2} = 0.28 \times 7$

${r}^{2} = 196$

$r = 14$

$circumference \: = 2\pi \: r$

$= \frac{2 \times 22 \times 14}{7}$

$= 88 \: cm$