Question

Find the circumference of a circle whose area is 1386 cm².
(A) 42
(B) 132 cm (C) 42 cm (D) 21 cm
in
2
Theifheim
If it is doubled how many times will be​

Answer 1

Answer:

Option B is correct

area is circle,

πr²= 1386

r²= (1386 ×7)/22

r=√441

r= 21cm

Circumference= 2πr

=2×22/7×21

=2×22×3

=6×22

=132cm