Question

》if area of a circle is 81 pi r sq. then find its circumference​

Answer 1

If you mean area = 81 square units,

Area = 22/7 × r × r

81 = 22/7 × r × r

r = 5 (approximately)

Circumference = 2 × 22/7 × r

= 22/7 × 2 × 5

= 10 pi

:-)

Answer 2

Answer:

Hope it works.............................................™✌️✌️