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Find the area of the shaded region

A. 549
B. 1256
C. 707
D. 400
E. 1863

Find the area of the shaded region A. 549 B. 1256 C. 707 D. 400 E. 1863-example-1
User Yossis
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1 Answer

3 votes

Answer:

A

Explanation:

The shaded area is the area of the outer circle - the area of the inner circle.

the radius of the outer circle r₁ = 40 ÷ 2 = 20m

The radius of the inner circle is r₂ = 15 cm, thus

shaded area = πr₁² - πr₂²

= π(20² - 15²) = π(400 - 225) = 175π ≈ 549 → A

User Flimm
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