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Curved Surface Area of a Right Circular Cone

In a farm, a ...

Question

In a farm, a heap of paddy is in the form of a cone with slant height 13 m and height 12 m. What is the area of canvas needed to protect it from sun and rain?

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Solution

From the relation $l^{2}$ = $h^{2}$ + $r^{2}$

r = 5m

Area to be covered = Curved Surface area of the cone= $π$ r l= 204.2 $m^{2}$

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