A right circular cylinder of height 15cm is covered by a rectangular tin foil of size 15cm ×24cm. the volume of the cylinder is.
If the volume of a cylinder is 196π and the ratio of radius to its height is 7:4 then find the curved surface area of cylinder?
The side of a square is increased by 40%. Find the percentage change in its area?
If the length of the rectangle is increased by 40%, by what percent should the width be reduced to maintain the same area?