If each edge of a cube is doubled. How many times will its surface area increase?

The volume of a cube is increasing at a rate of 9 cubie centimeters per second. How fast is the surface area increasing when the length of edge is 10 cms?

The volume of a cube is increasing at a rate of 8 cubie centimeters per second. How fast is the surface area increasing when the length of the edge is 12 cm?

The volume of a cube is increasing at a rate of 9 cubic centimetres per second. How fast is the surface area increasing when the length of an edge is 10 centimetres ?

If the side of a cube is doubled then the change in its T.S.A. is

If the radius of a cylinder is doubled keeping its lateral surface area the same, then what is its height ?

If the radius of a cylinder is doubled keeping its lateral surface area the Same, then what is its height ?

Each side of a cube is measured to be 7.203 m. What is total surface area?