Question

Observe the adjacent figure. It shows two circles with the same centre. The radius of the larger circle is $10cm$ and the radius of the smaller circle is $4cm$
Find the shaded area between the two circles. (take $\pi =3.14$)

Answer 1

Area of shaded region = $\pi (R^2-r^2)$

= $3.14({10}^2-4^2)$

= $3.14\times 84=263.76{cm}^2$