If the radius of a cylinder is increased by 25%, then by how much percent the height must be reduced, so that the volume of the cylinder remains same?

If the length of a rectangle is increased by 200/3 %, then by what percent should the width of the rectangle be decreased in order to maintain the same area ?

The length, breadth and height of a cuboid are increased by 10%, 20% and 50% respectively. What is the percentage increase in volume of the cuboid ?

If the area of the base of a cone is increased by 100%, then the volume is increased by –

If radius of a circle is increased by 10%, percentage increase in area is

If the radius of the circle is increased by 100%, then the area is increased by