Question

Find the area of a ring lying between the circumference of two concentric circle whose radii are 10.5cm and 7 cm.

Answer 1

$area \: of \: ring = \pi( {x {} }^{2} - {y}^{2} )$
Where
x=outer radius
y=inner radius

So,
$area \: of \: ring = \pi( {10.5 {} }^{2} - {7}^{2} )$
=192.5 sq. cm

Answer 2

Answer:

answer is 192.5

Step-by-step explanation:

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