Question

The area between two concentric circles of radius R and r is
(a) 2 pi R² - 2 pi r²
(b) pi (R² - r²) (R² + r²)
(c) pi (R + r) (R - r)
(d) 2 pi (R + r) (R - r)
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Answer 1

Answer:

Option C is correct

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Answer 2

Answer:

c) pi (R + r) (R - r)

Step-by-step explanation:

The Question says that⤵️

Find the area between two concentric circles with radius R and r units.

1️⃣ Area Of The Bigger Circle with Radius R units = pi R^2 sq. units

2️⃣ Area of the Smaller Circle with Radius r units = pi r^2 sq. units

3️⃣ Area between them is given by:

(Area Of Bigger Circle) - (Area Of Smaller Circle) sq. units

pi R^2 - pi r^2 sq. units

pi (R^2 - r^2) sq. units

⭕So....

Area Between The Concentric Circles = pi (R + r)(R - r) sq. units.

Hope It Helps....

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