Question

The cost of preparing the walls of a room 12 m long at the rate of Rs 1.35 per square metre is Rs 340.20 and the cost of matting the floor at 85 paise per square metre is Rs. 91.80. Find the height of the room.

Answer 1

We have,

Cost of matting the floor

Rate of matting per square meter

Length of the floor

Let,

Area of the floor

Width of the room

So,

Now, we have,

The cost of preparing the walls

The rate of preparing the walls

Let,

Lateral surface area of the room

Height of the room

So,

Hence, height of the room is .