Question

13. The area of the shaded portion in the adjoining Figure is​

Answer 1

Answer:

66sq.untis

Step-by-step explanation:

Area of shaded region = Area of Big Circle – Area of small circle

area= πR²– πr² ( R is radius of big circle and r is radius of small circle)

area=π(R²–r²)

area=π(5²–2²)

area=π(25–4)

area=π(21)

area=22/7 x 21

area=22 x 3

area = 66 sq.units

Answer 2

Answer:

$66 {cm}^{2}$

Step-by-step explanation:

diameter 1 =10 cm.

diameter 2= 4cm

radius 1 =5cm.

radios 2= 2cm

formula of area of circle = πr square

so area of shaded partion is = area of big circle -area of small circle

= π( r1)^2 -π(r2 )^2

$\pi { \frac{10}{2} }^{2} - \pi { \frac{4}{2} }^{2} \\ \pi( {5}^{2} - {2}^{2} ) \\ \pi(25 - 4) \\ \pi(21) \\ \frac{22}{7} \times 21 \\ 22 \times 3 \\ 66 {cm}^{2}$

i hope you can understand it

thank you