Mensuration Practice Test 1

Question : 32 of 40

Marks: +1, -0

Find the area of the region between two
concentric circles with radii 9 cm and 5 cm.

Solution:

Area of the region =

π(R^2-r^2)

{22}/7 [(9)^2-(5)^2]

{22}/7 [81-25]

{22}/7 × 56

176 cm^2

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