Question

Can someone help me understand this?

Answer 1

Step-by-step explanation:

Area of circle =\pi r^{2}πr

2

⇒\pi r^{2}=144\piπr

2

=144π

⇒r^{2}=144r

2

=144

⇒r^{2}=12^{2}r

2

=12

2

∴ r = 12 units

Circumference of circle =2\pi r2πr

=24\pi=24π units

=24\times 3.14=24×3.14

= 75.36 units