Question

if the radius of the circle is increased by 20 then the increase in area will be

Answer 1

the answer in area of the circle will be 400 as the area of circle is or square. therefore, 22/7*(n+20) square,(n+400) . therefore the increase in the area of the circle is 400.

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Answer 2

Let think radius is 20 increased by 20, 20+20=40 Area for circle 2πrsquare

=2×22/7×40square simplify u will get answer