Question

(U)
LIII
2. Find the area of the shaded region in Fig. 15.31.
3.5 cm
7 cm
Fig. 15.31​

Answer 1

Area of shaded region

$= \pi ( {R}^{2} - {r}^{2} ) \times \frac{30}{360} \\ \\ = \frac{22}{7} ( {7}^{2} - {3.5}^{2} ) \frac{1}{12} \\ \\ = \frac{22}{7} \times 36.75 \times \frac{1}{12} \\ \\ = 11 \times 5.25 \times \frac{1}{6} \\ \\ = \frac{57.75}{6} \\ \\ = 9.625 {cm}^{2}$

Answer 2

Answer:

Answer Given In attachment