Sol.
Part I. See Theorem 6, Page (xxxii).
Part II
.
Proof.
Q. 29. A tent is in the shape of a cylinder surmounted by a conical top. If the height and diameter of the cylindrical part are 2.1 m and 4 m respectively, and the slant height of the top is 2.8 m, find the area of the canvas used for making the tent. Find the cost of the canvas of the tent at the rate of Rs. 500 per m2. Also find the volume of air enclosed in the tent.
Sol. 
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