Question

by decreasing the radius of circle by 30% its area it decreased by how much percent

Answer 1

Step-by-step explanation:

answer is 49 % . please mark as the brainliest answer

Answer 2

Let radius of circle be r.

Area of circle = pi.r^2

Radius decreases = 30%

New radius is r - 50%of r = 0.7 r

New area = 3.14 * (.7r)^2

               = 0.49 * 3.14 * r^2

Hence decreasing in area = 51%