Question

find the radius of a circle whose area is 616 cm 2

Answer 1

Answer:

$Radius\:of\:the\:circle(r)=14\:cm$

Step-by-step explanation:

$Let\:Radius \:of \:a\:circle =r\:cm$

$Area\:of\:the \: circle (A)=616\:cm^{2}\:(given)$

$\implies \pi r^{2}=616$

$\implies \frac{22}{7}\times r^{2}=616$

$\implies r^{2}=616\times \frac{7}{22}$

$\implies r^{2}=28\times 7$

$\implies r =\sqrt{2\times 2\times 7\times 7}\\=2\times 7\\=14\:cm$

Therefore,

$Radius\:of\:the\:circle(r)=14\:cm$

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Answer 2

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