Math, asked by pranabhsacharia, 2 months ago

If the radius of the circle is decreased by 30% then how much % of area will decrease?​

Answers

Answered by sai172982
2

Answer:

let area of normal circle be πr²

now,

π(3/10*r) ²=9/100*πr²

% dec= (πr²-9/100*πr²) /πr²=81/100=81%

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