Question

A jokers cap in the form of a right circular cone of base radius 7cm and height 27cm find the area of the sheet required to make 10 such cones​

Answer 1

$\underline{\underline{\green{\textbf{Step - By - Step - Explanation : -}}}}$

To Find :

we need to find the area of sheet required to make 10 cones

Solution :

Radius of base = 7cm

Height = 27cm

$\boxed{\underline{\red{\bf{Slant\: height= \sqrt{r^{2}+h^{2}}}}}}$

Slant height = √7² + 27²

l = √49 + 729

l = √778

l = 27

$\boxed{\underline{\red{\bf{Curved\: surface\:Area\:of\:cone=\pi{rl}}}}}$

CSA Of 1 cone :

⠀⠀⠀⠀⠀⇛CSA = π × 7 × 27

⠀⠀⠀⠀⠀⇛CSA = 22/7 × 7 × 27

⠀⠀⠀⠀⠀⇛CSA = 594 cm²

Curved surface area of one cone is 594cm²

Curved surface area of 10 cones

⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀ ⠀ = 10 × 594

⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀= 5940 cm²

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