Question

find the circumference of a circle whose area is 1386 CM square​

Answer 1

Given area of circle = 1386 cm²

Area of circle = πr²

1386 = 22/7 × r²

r² = 1386×7/22

r² = 441

r = √441

radius = 21

circumference of circle = 2πr

=> 2×22/7×21

=> 44×3

=> 132

Ans :- circumference of circle is 132 cm

Answer 2

GIVEN :Area of circle is 1386

find the circumference ?

so,

22/7xr^2=1389

R^2=441

R=21

circumference of a circle =2×22/7×21

=132 cm

ANSWER....