Question

A room is 12 m wide and 4 m high. If the cost of colouring its walls at Rs 17 per sq. metre is Rs 3536, find the cost of plastering its floor and ceiling at Rs 15 per sq.

Option 1: Rs 588
Option 2: Rs 660
Option 3: Rs 720
Option 4: Rs 792

Answer 1

The cost of plastering the floor and ceiling is Rs 4320.

Step-by-step explanation:

To find the cost of plastering the floor and ceiling, we need to calculate the area of each. The floor area of the room is the same as its width multiplied by its length. So, the floor area is 12 m × 12 m = 144 sq. m. The ceiling area is also the same as the floor area. The total area to be plastered is the sum of the floor area and the ceiling area, which is 144 sq. m + 144 sq. m = 288 sq. m.

Now, we can calculate the cost of plastering the floor and ceiling. The cost per sq. m is given as Rs 15. So, the total cost is 288 sq. m × Rs 15 = Rs 4320.