The length, breadth, and height of a room are $5 m, 4 m, a n d 3 m$ respectively. Find the cost of whitewashing the walls of the room and the ceiling at the rate of $R s . 10 p e r s q m .$

Open in App

Solution

The length of a room $= 5 m$
The breadth of a room $= 4 m$
The height of a room $= 3 m$
Step 1: Calculate the total surface area of whitewashing.
Area of four walls of the room $= 2 h (l + b) = 2 \times 3 (5 + 4) = 6 x 9 = 54 s q . m$
Area of the ceiling $= l \times b = 5 \times 4 = 20 s q m .$
The total area of the four walls and the ceiling of the room $= 54 + 20 = 74 s q . m$
Step 2: Calculate the cost of the whitewashing.
Cost of whitewashing $= R s . 10 p e r s q . m$
Therefore, the total cost of whitewashing $= 74 \times 10 = R s . 740$
Hence, the total cost of whitewashing the room is $R s . 740$

Suggest Corrections

Similar questions

Q. The length, breadth and height of a room are

5 m

4 m

and

3 m

respectively. Find the cost white washing the walls of the room and ceiling at the rate of

R s . 7.50

per

m^{2}

Q. Question 2
The length, breadth and height of a room are 5 m, 4 m and 3 m respectively. Find the cost of whitewashing the walls of the room and ceiling at the rate of

R s 7.50 p e r m^{2}

Q. The length, breadth and height of a room are

5

4

m and

3

m respectively. Find the cost of white washing the walls of the room and the ceiling at the rate of Rs

7.50

per sq m.

The length, breadth, and height of a room are $5 m, 4 m, 3 m$ respectively. Find the cost of whitewashing the walls of the room and ceiling at the rate of $Rs . 7.50 per m^{2}$ .

The length, breadth and height of a room are 11m, 10m, 5m respectively. Find the cost of whitewashing its four walls and the ceiling at the rate of Rs 5 per m square.

Join BYJU'S Learning Program

The length, breadth, and height of a room are 5m,4m,and3m respectively. Find the cost of whitewashing the walls of the room and the ceiling at the rate of Rs.10persqm.

The length, breadth, and height of a room are $5 m, 4 m, a n d 3 m$ respectively. Find the cost of whitewashing the walls of the room and the ceiling at the rate of $R s . 10 p e r s q m .$