Question

solve it plz..............​

Answer 1

Answer:

< AOB = 60°

60° ÷ 360° = 1/6 of full circle ......{ arc is 60°}

r1 = 21cm

r2 = 42cm

$\mathrm{ \red{ Area \: of \: given \: circle \: = \frac{1}{6} \pi {r}^{2} }}$

(i) Area 1 = 1/6 × 22/7 × r²1

= 1/3 × 11/7 × 21 × 21

= 231cm²

(ii) Area2 = 1/6 × 22/7 × r2

= 1/3 × 11/7 ×42 × 42

= 924cm²

Area of Shaded region =

$\sf{ \blue{Area2 - Area1}}$

= 924 - 231

= 693cm²

Answer. Area of Shaded region = 693cm²