Question

Calculate:
The area of a circular ring is 942.6 sq cm and the radius of the larger circle is 20 cm.
(a) the area of the smaller circle, and
(b) the uniform width of the ring. (Use a = 3.142)
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Answer 1

Answer:

$\huge\red{ANSWER}$

Here we will discuss about the area of a circular ring along with some example problems.

The area of a circular ring bounded by two concentric circle of radii R and r (R > r)

= area of the bigger circle – area of the smaller circle

= πR22 - πr22

= π(R22 - r22)

= π(R + r) (R - r)

Therefore, the area of a circular ring = π(R + r) (R - r), where R and r are the radii of the outer circle and the inner circle respectively.

Answer 2

Step-by-step explanation:

REFER THE ATTACHMENT

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