Question

Find the area of a circle whose diameter is 18 cm.

Answer 1

area of circle =
$\pi \: r {}^{2}$

r = 18 / 2= 9

(22 × 9 ×9) / 7

254.57cm^2

Thanks

Answer 2

Diameter = 18cm

Radius = 18 /2 = 9cm

Area of circle = pi r^2

314 / 100 × 9 × 9

= 25434 / 100 = 254.34 cm^2

So area of circle = 254.34cm^2

Hope it helps you.