On increasing the radius of a shpere by 10%, find the percentage increase in its volume

If the radius of a circle is increased by 6 % , find the percentage increase in its area

The radius of a circle is increased by 10 % . Find the percentage increase in its area.

The radius of a circle is so increased that its circumference increased by 5%. Find the percentage increase in its area.

The surface area of a solid sphere is increased by 21% without changing its shape. Find the percentage increase in its volume .

If the edge of a cube is increased by 10%, then what will be the percentage increase in its volume ?