A circus tent is cylindrical to a height of 3 metres and conical above it. If its diameter is 105 m and the slant height of the conical portion is 53 m, calculate the length of the canvas 5 m wide to make the required tent.
For cylindrical part, we have
Height( h) = 3 m
Radius (r) =
m
∴ Total curved surface area = 2πrh+2πrl
= πr(2h+l) = 
×
× (6+53) m2= 11×15×59 m2
Hence, length of 5 m wide canvas = 
m = 1947 m
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