Question

from a circular metal sheet of radius 9 CM a circle of radius 4 cm is removed find the area of the remaining sheet​

Answer 1

Answer: 204.3$cm^{2}$

Step-by-step explanation:

area left= area of big circle- area of smaller circle

Area left:

$=Area\;of\;bigger\;circle-area\;of\;smallr\;circle\\=\pi R^{2}-\pi r^{2}=\pi(R^{2}-r^{2})\\=\frac{22}{7}\times(9^{2}-4^{2})=\frac{22}{7}\times(81-16)=\frac{22}{7}\times(65)\\=204.2857\approx204.3cm^{2}$

$Learning\;\;together\;:)$