Discussion of Question with ID = 033 under Areas

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Question

Two concentric circles of radii 18 and 16 cm are drawn on a paper. What is the area of the portion that is inside the outer circle but outside the inner circle?

A

68π sq. cm.

B

136π sq. m.

C

4624π sq. m.

D

34π sq. m.

Soln.
Ans: a

The required area is difference of the areas of the two circles. π($18^2 - 16^2$) = 68π sq. cm.


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