Question

The circumference of a circle is 39.6 cm . Find its area

Answer 1

Given,

2pie r=39.6 cm

From here, r= 39.6*7/22*2=6.3 cm

Now,

Area of circle

= pie r square

(22/7)*0.9*0.9cm^2

2.53cm^2

Hope it helps you....

Answer 2

Answer

Find out the its area .

To proof

As given

circumference of a circle is 39.6 cm

Formula

$Circunference\ of\ circle = 2\pi r$

where r = radius

$\pi = 3.14$

put in the above formula

39.6  = 2× 3.14× r

$r = \frac{39.6}{6.28}$

r = 6.31 cm ( approx )

Formula

$Area\ of\ circle = \pi r^{2}$

put the value

=3.14× 6.31× 6.31

= 125.022 cm²

Hence proved