Question

*What is the area of circle having circumference 20 cm?*



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Answer 1

Answer:

Answer; 31.76cm².

Hope, it will help you.

Answer 2

Answer:

Area of circle is 31.76 sq.cm

Step-by-step explanation:

Given that

Circumference of circle is 20cm

To find

Area of circle

Solution

Let r as radius of circle

As we know that

$circuference \: of \: circle = 2\pi \times r$

$r = \frac{20}{2\pi}$

put

$\pi = 3.14$

by multiplication and division we get

$r = 3.18cm$

now

As we know that

$area \: of \: circle = \pi \times {r}^{2}$

$area \: of \: circle = \pi \times {3.18}^{2}$

by multiplication we get

$area \: of \: circle = 31.76 {cm}^{2}$