Answer:
The cost of white-washing the walls from inside at the rate of 22.50 per m² is 1098
Step-by-step explanation:
Step 1: Finding the area of the room
Area of the room = Length X breadth
Length = 9m long
Breadth = 6m broad
Area of the room = 9 x 6 =54 square metres
Step 2: Finding the area of the door
Area of the door = Length x breadth
Breadth = 1.4m
Length = 2m
Area of the door = 1.4 x 2 = 2.8 square metres
Step 3: Finding the area of the Window
Area of the window= Length x breadth
Length = 1.6 m
Breadth = 75 cm
Converting cm to m
we have
75 cm =0.75 m
Area of the 1 window= 1.6 x 0.75 = 1.2 square metres
Step 4: Finding the area to be painted
Area to be painted = Total area of the room - area of the door - 2(area of the window)
Area to be painted = 54 - 2.8 - 2(1.2)
Area to be painted = 54 - 2.8 - 2.4
Area to be painted = 48.8 square metres
Step 5: Finding the cost for painting
For painting one square metre = $22.50
For painting 48.8 square metres = 22.50 x 48.8 = 1098
