Surface area of Cuboid
We know that surface of a cuboid consists of six rectangular faces.
The sum of the areas of six rectangular faces is called the surface area of the cuboid.
Let the length, depth or breadth, and height(in cm) of a cuboid be l, b, and h respectively. Here are surface area of cuboid formula:
Surface area of Cuboid Examples
Example1. Find the area of the cardboard require to make a closed box to length 12 cm, breadth 10 cm, and height 7 cm.
Solution: Here l = 12 cm, b=10 cm, h = 7 cm
As we know, surface area = 2(lb + bh + hl)12
= 2(12 x 10 + 10 x 7 + 7 x 12) cm2
= 2(120 + 70 + 84) cm2
= 2 x 274 cm2
= 548 cm2