Question

The area of a circular ring formed by two concentric circles whose radii are 5.7 cm and 4.3 cm respectively is (Take
= 3.1416)
(a) 43.98 sq. cm.
(b) 53.67 sq. cm.
(c) 47.24 sq. cm.
(d) 38.54 sq. cm.​

Answer 1

Answer:

d)

Step-by-step explanation:

Answer 2

The answer is (a) 43.98 sq. cm.

The area of a circular ring formed by two concentric circles whose radii are 5.7 cm and 4.3 cm respectively is:

$(π * (5.7^2 - 4.3^2)) = (3.1416 * (32.49 - 18.49)) = (3.1416 * 14) = 43.98 sq. cm.$

So the answer is (a) 43.98 sq. cm.

• A circular ring is a shape formed by two concentric circles, where one circle is inside the other. The area between the two circles is called the circular ring. The outer circle is called the annulus, and the inner circle is called the hole of the annulus. The area of the circular ring is calculated by subtracting the area of the inner circle from the area of the outer circle.

• For example, if the radii of the outer circle and inner circle are R1 and R2 respectively, the area of the circular ring can be calculated as: (π * R1^2) - (π * R2^2)

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