 Hello and welcome to the session my name is Mansi and I am going to help you with the following question. The question says a plastic box 1.5 meter long, 1.25 meter wide and 65 centimeter deep is to be made. It is to be open at the top ignoring the thickness of the plastic sheet, determine first the area of the sheet required for making the box and second the cost of sheet for it if a sheet measuring 1 meter square cost rupees 20. So let us start with the solution to this question. First of all let us write down what is given to us in the question or we are given a plastic box with this this and this measurements. Now it is to be open at the top. So let us write down the measurements. We see that length that is L is equal to 1.5 meter, breadth is equal to B that is 1.25 meter and depth is same as height that is equal to 65 centimeter. Now we see that we have length in the terms of meter, breadth also units we have meter. So now we will convert this into meter this will be equal to 0.65 meter. Now this happens because we know that 1 meter is equal to 100 centimeter. So we will divide this by 100 and we get 0.65 meter. Now we see the solution to the first part that is now we have to determine the area of the sheet required for making the box. So we see that it is given to us in the question that the plastic box is open at the top. So we can say that the area includes the area of walls plus the area of the base. Now we know that thus B that is twice of height into length plastic box that is open at the top. We will add or let us simply write down the values plus 1.275 solution to the second part of the question. That means now we have sheet for it. If a sheet measuring 1 meter square costs rupees 20. The question that cost of 1 meter square of sheet rupees 20 therefore 109. So this is our answer to second part of the question. Have a good day.