To determine the cost of painting, we need some additional information:

1. Dimensions of the room: We need the length, breadth, and height of the room to calculate the total area to be painted.

2. Doors and windows: Doors and windows typically aren't painted, so their area needs to be subtracted from the total wall and ceiling area to get the actual painting area.

Here's how to calculate the cost once you have the missing information:

1. Calculate the wall area: Multiply the length by the height of each wall and add the areas of all walls. Remember to subtract the area of doors and windows from the total wall area.

2. Calculate the ceiling area: Multiply the length by the breadth of the ceiling.

3. Total Painting Area: Add the total wall area you calculated in step 1 to the ceiling area.

4. Cost Calculation: Multiply the total painting area (from step 3) by the painting rate (Rs 30 per meter square).

For example:

Let's say the room is 5 meters long, 4 meters wide, and 3 meters high. There's a single door measuring 1 meter x 2 meters and one window measuring 1.5 meters x 1 meter.

1. Wall Area:

   • Total wall area = 2 (length x height) + 2 (breadth x height) = 2(5 x 3) + 2(4 x 3) = 30 square meters
   • Door area = 1 x 2 = 2 square meters
   • Window area = 1.5 x 1 = 1.5 square meters
   • Total wall area to be painted = 30 sq m - 2 sq m - 1.5 sq m = 26.5 sq m

2. Ceiling Area:

   • Ceiling area = Length x Breadth = 5 meters x 4 meters = 20 square meters

3. Total Painting Area:

   • Total area = Wall area + Ceiling area = 26.5 sq m + 20 sq m = 46.5 sq m

4. Cost:

   • Cost = Total area x Painting rate = 46.5 sq m * Rs 30/sq m = Rs 1395

Remember:

• This is just an example. You'll need to replace the dimensions with the actual size of your room and adjust for doors and windows.
• This calculation assumes a single coat of paint. The cost might increase if multiple coats are required.