Question

fine the diameter of a circle whose area is 1386cm²
(take π=22/7)

Answer 1

Area of a circle= $\pi r^2$

1386 = $\frac{22*r^2}{7}$

$\frac{1386*7}{22} = r^2$

63*7 = r^2

441= r^2

√441 = radius

21 = radius

Now,

Diameter of circle = 2*radius

diameter of circle = 2*21

Diameter of circle= 42cm



i hope this will help you


by ABHAY

Answer 2

Here is your answer it may help you....