Question

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. Also find the rate of the canvas with 500 per `m^2`

Answer 1

area of canvas used=curved surface area of cone+curved surface area of cylinder.
curved surface area of cone=>`pirl=22/7xx2xx2.8=17.6(m)^2`
curved surface area of cylinder=>`2pirh=2xx22/7xx2xx2.1=26.4(m)^2`
total surface area=`26.4+17.6=44(m)^2`.
cost of canvas=`500xx44=Rs22000`