Question

12. In the given figure, a circle of radius 21 cm is given. Inside this circle two circles with radius 7 cm and 14 cm have been drawn, find the area of shaded region.​

Answer 1

Area Of Shaded Region = 769.3 cm

Step-by-step explanation:

GIVEN

Radius of big shaded circle region = 14 cm

Radius of small shaded circle region = 7 cm

___________________________

TO FIND

Area Of Shaded Region

___________________________

Let's find the area of big shaded circle

We know that,

Area Of Circle = π × r²

Area Of Circle = 3.14 × 14²

Area Of Circle = 3.14 × 196

Area Of Circle = 615.44

Area Of Big Shaded Circle Region = 615.44 cm

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Let's find the area of small shaded circle

We know that,

Area Of Circle = π × r²

Area Of Circle = 3.14 × 7²

Area Of Circle = 3.14 × 49

Area Of Circle = 153.86

Area Of Small Shaded Circle Region = 153.86 cm

___________________________

Let's find the area of shaded region

Area Of Shaded Region = Area Of Big Shaded Circle Region + Area Of Small Shaded Circle Region

Area Of Shaded Region = 615.44 + 153.86

Area Of Shaded Region = 769.3

Area Of Shaded Region = 769.3 cm

Answer 2

Answer:

area of shaded region is. 769.3 cm