Question

Find the circumference of the circle having area of 1386 cm²
Take π as 22/7​

Answer 1

Answer:

area of circle = 1386cm²

=> πr² = 1386

=> 22/7 × r² = 1386

=> r² = 1386 × 7/22

=> r² = 441

=> r = √441

=> r = 21 cm

circumference = 2πr

= 2 × 22/7 × 21

= 2 × 22 × 3

= 136 cm