Question

b) The length, breadth and height of a room are 6m, 5.4m and 4 m respectively. Find the area . i) Its four-walls ii) Its roof.​

Answer 1

Answer:

Area of 4 walls = 45.6 m^2

Area of Roof = 32.4 m^2

Step-by-step explanation:

(i) Area of 4 walls = Area of 2 walls opposite to each other + Area of other 2 walls which also opposite to each other

Area of 4 walls = (Length × Height) + (Breadth × Height)

Area of 4 walls = (6 × 4) + (5.4 × 4) = (24) + (21.6)

Area of 4 walls = 45.6 m^2

(ii) Area of Roof = Length × Breadth

Area of Roof = 6 × 5.4

Area of Roof = 32.4 m^2

Answer 2

i} A of 4 walls = 2(l+b)*h-------->2(6m+5.4m)*4m--------->22.8m*4m

  A of 4 walls= 91.2 m^2

ii} A of the roof = A of the floor = l*b--------------> 6m * 5.4m

    A of the roof = 32.4 m^2