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Question

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.

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Solution

Radius of the tent, r = 52.5 m
Height of the cylindrical portion of the tent, H = 3 m
Slant height of the conical portion of the tent, l = 53 m
The tent is a combination of a cylindrical and a conical portion.
i.e., area of the canvas = curved surface area of the cone + curved surface area of the cylinder
= πrl +2πrH
=227×105253 +2×3 =227×1052×53+6=9735 m2

But area of the canvas = length × breadth

∴ Length of the canvas = areabreadth=97355=1947 m

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