the radius of a cone is 5 cm and height is 12 cm then find the curved surface area and volume of a cone
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r= 5cm
h= 12cm
l= ?
But we know r, h and l form a right angled triangle where l is the hypotenuse.
∴ r²+h²=l²
5²+12²= l
169 = l²
∴ l = 13cm
CSA of a cone = πrl
=π×5×13 cm²
= 204.2 cm²
h= 12cm
l= ?
But we know r, h and l form a right angled triangle where l is the hypotenuse.
∴ r²+h²=l²
5²+12²= l
169 = l²
∴ l = 13cm
CSA of a cone = πrl
=π×5×13 cm²
= 204.2 cm²
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