Question

Find the circumference of a circle whose area is 1386cm?.
a) 132cm
b) 132cm 3) 42cm
4) 21cm​

Answer 1

Answer:

$area = 1386 \\ \pi {r}^{2} = 1386 \\ = > {r}^{2} = \frac{1386 \times 7}{22} \\ = > {r}^{2} = 441$

Answer 2

Step-by-step explanation:

Given

Area=1386cm^2

Take pie =22/7

22/7 *r^2=1386

r^2=441

r=21cm

Circumference =2 pie r

2*22/7*21=132cm