Area and Perimeter Practice Test 3

Question : 12 of 40

Marks: +1, -0

Find the area of cicular ring whose external and internal diameters are 20 cm and 6 cm respectively.

Solution:

Area of circular ring =

{22}/7 (10^2 - 3^2)

{22}/7

(0 + 3) (10 - 3)
= 22 × 13 = 286

cm^2

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