Question

diameter of a cycle wheel is 21 cm find the area of wheel

Answer 1

HEYA!!!!

Given,

diameter of circle = 21 cm

then radius = 21/2 = 10.5

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


$= \frac{22}{7} \times {(10.5)}^{2}$

= 22/7 × 10.5 × 10.5

= 22/7 × 110.25

= 346.5 cm^2...


HOPE THIS HELPS U. .

Answer 2

Area of wheel will be = pi r*r
That is=22/7*21/2*21/2
=346.5
$22 \div 7 \times 21 \div 2 \times 21 \div 2 = 346.5$