Question

find the circumference and area of a circle of radius 20cm. ( use = 3.14 )

Answer 1

Answer:

Circumference = 125.6

Area = 1,256 cm²

Step-by-step explanation:

Radius = 20 cm

Circumference = 2 π r

= 2 × 3.14 × 20

= 125.6 cm

Area = π r ²

= 3.14 × 20 × 20

= 1,256 cm²

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

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

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

$= 2 \times 3.14 \times 20$

by multiplication we get

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