Question

The total surface area of four wall at a room is 120 m square . Its height is 2 meters if the room is in the form of a square . Find the total cost of flooring at the rate of rs 78/ m square and painting the ceiling at the rate of 126/m square.

Answer 1

Answer:

₹ 45,900

Step-by-step explanation:

Since the room is in the form of square, the 4 walls are equal rectangles. and floor is a square.

Area of one wall = 120/4 = 30 m²

given height = 2 m

width of wall = 30/2 = 15 m

width of wall=side of floor

So area of floor = 15² = 225 m²

Also area of ceiling = 225 m²

cost of flooring = 225 × 78 = ₹ 17,550

cost of painting ceiling = 225 × 126 = ₹ 28,350

Total cost = 17550 + 28350 = ₹ 45,900

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