Question

Find the area of circle whose radius is 1cm.

Answer 1

Area of circle =

$\pi \times r ^{2}$

Area=22/7×1/1

=22/7 cm square

$3.14cm ^{2}$

Answer 2

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

$\: \: \: \: \: \: \: \ \: \: \: \: \: \: \: \: \: \: \: \: \: = 3.14 \times 1 \times 1$

$area \: of \: circle = 3.14cm {}^{2}$