Question

find the circumstance of a circle whose area is 1386 cm2

Answer 1

Given that : Area of circle = 1386 cm²

According to the question :

$\pi {r}^{2} = 1386 \\ \\ = > \frac{22}{7} \times {r}^{2} = 1386 \\ \\ = > {r}^{2} = 441 \\ \\ = > r = 21$

Now, Circumference to the circle :

$2 \times \frac{22}{7} \times 21 \\ \\ = > 132 \: cm$

Answer 2

Answer: 132cm²

Step-by-step explanation:

According to problem,

πr² = 1386

or, r² = 441

or, r = 21

Therefore, circumference = 2πr = 2*22/7*21 = 132cm²