area of cube,cuboid,cylinder with formula and one solved examples for each?

(a is the length of the side of each edge of the cube)
In words, the surface area of a cube is the area of the six squares that cover it. The area of one of them is a*a, or a^{ 2} . Since these are all the same, you can multiply one of them by six, so the surface area of a cube is 6 times one of the sides squared.
Example #1:
Find the surface area if the length of one side is 3 cm
Surface area = 6 × a^{2}
Surface area = 6 × 3^{2}
Surface area = 6 × 3 × 3
Surface area = 54 cm^{2}
Surface Area of a Cube = 6 a^{ }^{2}
 
Surface area of cuboid = 2lw + 2lh + 2wh = 2(lw + lh + wh)
