The radius of a cone is 3cm and vertical height is 4cm. Find the area of the curved surface.

Explanation

given ,

`r=3cm`

`h=4cm`

so `l=(r^2+h^2)^(1/2)`

so, `l=(3^2+4^2)^(1/2)`

so `l=5cm`

so curved surface area of cone`=pirl`

`=pixx3xx5`

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