Question

Both circle have same centre. What is the area of shaded region. ( use π = 3.14)​

Answer 1

Area of the circle=2πr

=2×3.14×36

=226.08

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Answer 2

Answer:

$3,617.28{ft}^{2}$

Step-by-step explanation:

Given,

Radius of small circle = 12 ft

Area of the small circle

$= {\pi r}^{2}$

= 3.14 × 12ft × 12ft

$= 452.16 {ft}^{2}$

Then,

Radius of big circle = 12ft + 24ft = 36ft

Are of the big circle

$= \pi {r}^{2}$

= 3.14 × 36ft × 36ft

$= 4,069.44 {ft}^{2}$

Therefore,

Area of the shaded region,

$= (4,069.44 - 452.16){ft}^{2}$

$= 3,617.28{ft}^{2} \: (ans)$