The diameter of sphere is decreased by 20% .By what percent does it curved surface area decreases Or increases
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By the formula;
(2x+ x^2/100)%
so,
here x= -20
(-20×2+-20×-20/100)= -36%
here negative sign shows the decreased %
(2x+ x^2/100)%
so,
here x= -20
(-20×2+-20×-20/100)= -36%
here negative sign shows the decreased %
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