Question

The cost of painting the four walls of a room 12 m long at ₹ 30 per m² is ₹ 7560 per m² and the cost of covering the floor with the mat at ₹ 25 per m2 is ₹ 2700. Find the dimensions of the room.

Answer 1

As, the rate of covering the floor = ₹ 25 per m²

And, the cost of covering the floor = ₹ 2700

So, the area of the floor = \(\frac{2700}{25}\)

Also, 

As, the rate of painting the four walls = ₹30 per m²

And, the cost of painting the four walls = ₹7560

So, the area of the four walls = \(\frac{7560}{30}\)

So, the dimensions of the room are 12m x 9m x 6m.