 Hello and welcome to the session. My name is Mansi and I am going to help you with the following question. The question says, the floor of a rectangular hall has a perimeter 250 meter. If the cost of painting the four walls at the rate of rupees 10 per meter square is rupees 15,000 pying the height of the hall. So let us start with the solution to this question. It is given to us in the question that cost of painting the four walls is equal to rupees 15,000 where the rate of painting is rupees per meter square. Therefore we can say that is equal to cost of painting the four walls divided by rate of painting. So that is divided by 100 meter square. So area of four walls is equal to 1500 meter square just breadth into height and that is given to us to be equal to 15 to height that is equal to 1500. Now it is given to us in the question that perimeter is 250 meter. So we can say that h that is height in 100 and this implies that height in 100 divided by 250. We know that 250 multiplied by 6 gives us 1500 is equal to 6 meter. So our answer to this question is that height of the hall is 6 meter. So I hope that you understood the question and enjoyed the session. Have a good day.