Question

Radius increased by 200 percent area of circle will increase by how many percent

Answer 1

Let radius
$r_{1} = r cm$
r2 = r + 2r = 3r.

Initial area = πr²

Final area = π ( 3r)² = 9πr² = 9 × Initial area.

Percentage increase in area
= 9πr²-πr² / πr²×100

= 8*100

=800% .


Area of the circle increases by 800%