If the radius of a circle is increased by 20% then by how much will its area be increased?

If the radius of a circle is increased by 6%, then its area will increase by

If the radius of the circle is increased by 50%, then by how much per cent the area of the circle is increased?

If the length of radius of a sphere is increased by 50%, then how much percent will be increased of its curved surface area.

If the side of square is increased by 20% , then how much per cent does its area get increased :

If the radius of a circle is increased by 8% ,then the area of the circle will be

If the length of radius of a sphere is increased by 50% , then find how much percent will be increased of its curved surface area.

If the radius of a circle is increased by 200%, then its area will increase by (a) 200% (b) 400% (c) 800% (d) 900%