If the radius of a circle is decreased 30%, what happens to the area?
If the radius of a circle is decreased 30%, what happens to the area?
Answer/Solution
51% decrease
Steps/Work
Area of Square = Pi* radius^2
New Radius = 0.7 * old radius
so new area = (0.7)^2 old area => 0.49 of old area => 49% old area
Ans : A
New Radius = 0.7 * old radius
so new area = (0.7)^2 old area => 0.49 of old area => 49% old area
Ans : A