Question

Write the formula of area of four walls of a rectangular room.​

Answer 1

Answer:

Formula of the area of four walls,

=> (area of the base ) + (area of ceiling)

=> Area of base = l * b

=> Area of ceiling = l * b

So,

=> (area of the base ) + (area of ceiling) = 2(l*b)

=> As per Surface area of a cuboid we have 2(l+b)*h

Then finally we get,

Area of four walls = 2(l+b)*h

Answer 2

Answer:

2×Height ( Length + Breadth )