Question

find the circumference and area of a circle of radius 20cm (use pie=3.14​

Answer 1

Answer:

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

Given : radius of circle= 20cm

π=3.14

To find: circumference and area of a circle

Solution: Circumference of a circle=2πr

= 2×3.14×20

= 125.60.

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

Given: Radius of circle=20

π= 3.14

To find: area of circle

Solution:

Area of circle=πr^2

= 3.14×20×20

= 1256 sq.cm

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