Question

The dimensions of a room is 8 m × 6 m × 4.5 m. Find the total cost of painting its four walls and the ceiling at the rate of Rs. 550 per m2.

Answer 1

Answer:

Given;

l = 8m

b = 6m

h = 4.5m

Firstly, you need to keep this thing in mind that if a “room is being painted” questions arise, u need not to consider the floor (common sense)

Now, area of ceiling = l*b = 8*6 = 48m^2

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

= 2(8*4.5) + 2(6*4.5)

= 72 + 54

= 126 m^2

Total area to be painted = 126 + 48 which is equal to 174m^2

Now for 1m^2 , cost is Rs. 550

for 174 m^2, cost would be 174*550

= Rs. 95,700