If a store room of a house is in the shape of a cuboid having a length of 3m, a width of 2m, and a height of 4m, find the total area of its four walls.
Answer & explanation
Correct answer: option 3
We know that,
Area of 4 walls = 2(l + b)h
Length = 3 m,
width = 2 m,
height = 4 m.
Area of walls = 2(3 + 2)4 = 40