 Hi, and welcome to our session. Let us discuss the following question. The question says that radii of the circular ends of a frustrum are 33 centimeters and 27 centimeters. Its land height is 10 centimeters. Find its volume and whole surface area. Let's now begin with the solution. We are given that land height of the frustrum is 10 centimeters. And radii of the circular ends are 27 centimeters and 33 centimeters. Now for the dominant volume of the frustrum, we have to possible find height of the frustrum. We know that L squared is equal to H squared plus R2 minus R1 whole square. L is equal to 10 centimeters, and we have to find H plus R2 minus R1 whole square is 33 minus 27 whole square. Now this implies 100 is equal to H squared plus 36. This implies 100 minus 36 is equal to H squared. This implies 64 is equal to H squared. And this implies H is equal to 8 centimeters. So height of the frustrum is 8 centimeters. Now let us find volume of the frustrum. We know that volume of a frustrum is equal to 1 by 3 pi H into R1 square plus R1 into R2 plus R2 square. Now substitute the values of H, R1, R2, and pi in this. So we have 1 by 3 into 22 by 7 into 8 into 27 square plus 27 into 33 plus 33 square. This is equal to 1 by 3 into 22 by 7 into 8 into 729 plus 891 plus 1089. And this is equal to 1 by 3 into 22 by 7 into 8 into 2709. On cancelling 2709 by 3, we get 903. And on cancelling 903 by 7, we get 129. Simplifying this, we get 22704. So volume of a frustrum is 22,704 centimeters cubed. Find whole surface area of a frustrum. Now whole surface area of a frustrum is equal to pi L into R1 plus R2 plus pi R1 square plus pi R2 square. Now substitute the values of pi L, R1 and R2 in this. So we have 22 by 7 into 10 into 27 plus 33 plus 22 by 7 into 27 into 27 plus 22 by 7 into 33 into 33. This is equal to 22 by 7 into 600 plus 729 plus 1089. This is equal to 22 by 7 into 24 by 8. This is equal to, here we will have 22. And simplifying this, we get 7598.8. So whole surface area of the frustrum is 7598.8 centimeters squared. This is our required answer. So this completes the session. Bye and take care.