The length, breadth and height of a room are 5 m, 4 m and 3 m respectively. Find the cost of white washing the walls of the room and the ceiling at the rate of Rs. 7.50 m².

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Solution

Dimensions of the room are,
Let,
S The total surface area to whitewash
A₁ The lateral surface area of the room
A₂ The surface area of ceiling
R The rate of whitewashing per
We know that,
We are asked to find the cost of whitewashing
Now, the total surface area to whitewash,
Total cost of whitewashing,
Hence the cost of whitewashing the room and the ceiling is .

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The length, breadth and height of a room are 5 m, 4 m and 3 m respectively. Find the cost of white washing the walls of the room and the ceiling at the rate of Rs. 7.50 m2.

The length, breadth and height of a room are 5 m, 4 m and 3 m respectively. Find the cost of white washing the walls of the room and the ceiling at the rate of Rs. 7.50 m².