The length of a cuboid is thrice of its breadth and the height of cuboid is twice of its breadth. If the breadth of the cuboid is 6 cm, them what is the total surface area of cuboid?

792 cm²

We know that,

The total surface area of a cuboid = 2(lb + bh + hl)

We have,

Breadth = 6 cm

Length = 3b = 18 cm

Height = 2b = 12 cm

So the total surface area of a cuboid = 2(18 × 6 + 6 × 12 + 12 × 18)

2(108 + 72 + 216) = 792 cm²