A room having length 4m and breadth 3m contains 193m^3 of air .It has a windows of 1m*1m and a door of 2m*1m, Find the total cost of colouring on its four walls at the rate of RS 250 per m^2
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Step-by-step explanation:
It is given that the length, breadth, and height of a room are 8 m, 5 m, and 3 m respectively.
The area of four walls of the room is: 2h(l+b)
A=2h(l+b)=2×3(8+5)=6×13=78 m^2
The Area of the ceiling is: A=l×b=8×5=40 m^2
The Total area of the four walls and the ceiling of the room is 78+40=118 m^2
It is given that cost of whitewashing is Rs.15/m^2
∴ Therefore
The total cost of whitewashing is: 118×15=1770
Hence, the cost of whitewashing the walls is Rs.1770.
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