Question

Find the area of the circle from given information:

No.	Radius $\left(r\right)$	Diameter $\left(d\right)$	Area of circle
$\left(1\right)$	$42cm$	________	______
$\left(2\right)$	________	$14metre$	______
$\left(3\right)$	$1.4cm$	________	______
$\left(4\right)$	$28metre$	________	______
$\left(5\right)$	$35cm$	________	______
$\left(6\right)$	_______	$5.6metre$	______

Answer 1

As we know $d=2randarea=\pi r^2$

We get the answers as below:

$\left(1\right)84cm,5544sqcm$
$\left(2\right)7m,154sqm$
$\left(3\right)2.8cm,6.16sqcm$
$\left(4\right)56m,2464sqm$
$\left(5\right)70cm,3850sqcm$
$\left(6\right)2.8m,24.64sqm$.