Question

the wall and the ceiling of a room of length 18m, breadth 15m and height 12m are to be whitewashed and the floor of the room is to be covered with tiles of length 3m and breadth 2m. find the total cost of whitewash and tiling at the rate of 25 rs per square metre

Answer 1

The total cost of whitewash and tiling in the room is 26550rs.

Step-by-step explanation:

To find the total cost of whitewashing and tiling, we need to calculate the area of the walls, ceiling, and floor. Firstly, let's calculate the area of the walls and ceiling. The length of the room is 18m, the breadth is 15m, and the height is 12m. The area of the walls and ceiling is given by the formula:

2(length × height + breadth × height) = 2(18 × 12 + 15 × 12) = 2(216 + 180) = 792m²

Next, let's calculate the area of the floor. The length is 18m and the breadth is 15m. The area of the floor is given by the formula:

length × breadth = 18 × 15 = 270m²

Finally, let's calculate the total cost of whitewashing and tiling.

Cost of whitewashing = Area of walls and ceiling × Rate = 792m² × 25rs/m² = 19800rs

Cost of tiling = Area of floor × Rate = 270m² × 25rs/m² = 6750rs

Total cost = Cost of whitewashing + Cost of tiling = 19800rs + 6750rs = 26550rs