 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 small indoor greenhouse herbarium is made entirely of glass panes including the base held together with tape. It is 30 cm long, 25 cm wide and 25 cm high. First question is what is the area of the glass and second is how much of tape is needed for all the 12 edges? Let us start with the solution to this question. Here length that is L is equal to 30 cm, breadth is equal to 25 cm and height is equal to 25 cm. First of all what we are supposed to find is area of the glass. So area of the glass is the total surface area and we know that the total surface area will be equal to twice of length into breadth plus breadth into height plus height into length. We simply put in the values of length, breadth and height we get twice of 30 into 25 plus 25 into 25 plus 25 into 30 which is equal to twice of 750 plus 625 plus 750 and that is equal to twice of 2125 that is equal to 4250 cm2. So this is how we get the answer to the first part that is area of the glass the same as total surface area that is equal to 4250 cm2. So this is our answer to the question. Let us see the solution to the second part of the question now. We see that tape needed for all 12 edges will be equal to the sum of all the edges and that will be equal to 4 times length plus breadth plus height that is equal to 4 into 30 plus 25 plus 25 that is equal to is equal to 320 cm2. So our answer to the second part is 320 cm2 but you understood the question and enjoyed the session. Have a good day.