Question

find the area of a circle whose circumference is 15.7cm

Answer 1

Circumference = 2πr
15.7 = 2× 22/7×r
r =
$\frac{15.7 \times 7}{22 \times 2}$
r = 2.50 cm
Now, Area of circle =
${\pi \: r}^{2}$
= 22/7× 2.5 ×2.5
= 19.64 cm2

Answer 2

area of circle is 19.625
it is the answer. .........