If the radius of a sphere is increased by 2 cm, its surface area is increased by 352 cm². What is the radius of the sphere? (π = 22/7)

The surface area of a sphere is 616 sq. cm, then what will be its radius?

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

A cube whose edge is 14 cm long has on each of its faces a circle of 7 cm radius painted yellow. What is the total area of unpainted surface ? (Take π = 22/7)

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

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