 Hi and welcome to the session. Let's work out the following question. A question says, a tent is in the form of a cylinder of diameter 4.2 meter and height 4 meter surmounted by a cone of equal base and height 2.8 meter. Find the capacity of the tent and the cost of canvas for making the tent at rupees 100 per square meter. Now this is how we interpret the question. We see that this tent is in a form of cylinder. The diameter is 4.2 meter. Since the diameter is 4.2 meter so radius will be d by 2 that is 4.2 by 2 that is equal to 2.1 meter so this is 2.1 meter. It is surmounted by a cone of equal base and the height of the cone is 2.8 meter. We have to find the capacity of the tent. So radius will be 2.1 meter. Height of the cylinder that is h is equal to 4 meter. Therefore the curved surface area of the cylinder say c1 is equal to 2 pi rh that is equal to 2 into 22 by 7 into 2.1 into 4 that is equal to 44 into 0.3 into 4. That is equal to 52.8 meter square. Now height of the cone h is equal to 2.8 meter. Radius of the cone is 2.1 meter. Therefore the slant height will be equal to square root of 2.1 the whole square plus 2.8 the whole square. That is equal to square root of 4.41 plus 7.84 that is equal to square root of 12.25 that is equal to 3.5 meter. Therefore the curved surface area of the cone say c2 will be equal to pi rl that is equal to 22 by 7 into 2.1 into 3.5. That is equal to 22 into 0.3 into 3.5 that is equal to 23.1 meter square. Therefore the total surface area of the tent will be equal to c1 plus c2 that is equal to 52.8 plus 23.1 that is equal to 75.9 meter square. Now we see that 1 meter square canvas costs rupees 100. Therefore 75.9 meter square canvas costs 75.9 into 100 that is equal to rupees 7590. So our answer to this question is that the capacity of the tent is 75.9 meter square and the cost of canvas for making the tent at rupees 100 per square meter is rupees 7590. So I hope that you understood the solution and enjoyed the session. Have a good day.