The internal measures of a cuboidal room are `12m xx 8m xx 4m` . Find the total cost of whitewashing all four walls of a room, if the cost of white washing is Rs 5 per `m^2`. What will be the cost of white washing if the ceiling of the room is also whitewashed.

Explanation

To solve the problem step by step, we will first find the area of the four walls of the cuboidal room and then calculate the cost of whitewashing. After that, we will include the ceiling in our calculations.

### Step 1: Identify the dimensions of the cuboidal room
- Length (l) = 12 m
- Breadth (b) = 8 m
- Height (h) = 4 m

### Step 2: Calculate the area of the four walls
...