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?
Answer & explanation
Correct answer: option 4
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