Question

Calculate the perimeter and area of a circle whose radius is 7cm(22/7

`\pi`
​

Answer 1

Given :

• Radius, r = 7 cm

To find out:

Find the perimeter ( circumference ) and area of the circle?

Formula used:

• Area of circle = πr²

• Perimeter of circle = 2πr

Solution:

★ Area of circle = πr²

= 22/7 × 7²

= 22/7 × 49

= 22 × 7

= 154 cm²

★Perimeter of circle = 2πr

= 2 × 22/7 × 7

= 2 × 22

= 44 cm