Question

the area of a circle is 394.24 calculate the radius of a circle and the circumference of circle

Answer 1

πr^2
22/7*r^2=394.24
r^2= 394.24*7/22
r^2=125.44
r=
$\sqrt{125.44}$
r=11.2

Answer 2

The Radius of Circle is 11.2 and Circumference of Circle is 70.4

Step-by-step explanation:

The area of Circle = 394.24

πr^2 = 394.24

22/7 x r^2 = 394.24

r^2 = 394.24*7/22

r^2 = $\sqrt{125.44}$

The radius of circle (r) =  11.2

Now,

The Circumference of Circle = 2πr

                                                = 2 x 22/7 x 11.2

The Circumference of Circle = 70.4

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