Question

Find area of a Circle whose radius is 20cm (r=3.14)also circumference.
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Answer 1

Answer:

22/7*20*20= 1257.1 ........

Answer 2

Answer:

Area is 1256 sq cm

Circumference is 125.6cm

Step-by-step explanation:

Given that

Radius of circle is 20cm

To find

Area of circle

Circumference of circle

Solution

As we know that

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

hence

take

$\pi = 3.14$

now

$area \: of \: circle = 3.14 \times 20 \times 20$

hence by multiplication we get

$area \: of \: circle = 1256 {cm}^{2}$

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

$= 2 \times 3.14 \times 20$

by multiplication we get

$circumference \: of \: circle = 125.6cm$