Question

If the diameter of the base of the cone is 5cm and the height is 12cm, then what is the diagonal height of the cone?
please Sahi tarike se answer dijiye ​

Answer 1

Answer:

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Answer 2

Given:

$★\sf \colorbox{god} {The Height of cone ( h )= 12cm}$

$★\sf \colorbox{god} {Radius of the base of cone(r) = 5cm}$

Solve:

$︎\text{Slant Height of cone (l) = } \sqrt{ {r}^{2} + {h}^{2} }$

$⇒l = \sqrt{ {5}^{2} + {12}^{2} }$

$⇒l = \sqrt{25 + 144}$

$⇒l = \sqrt{169} = 13\sf \colorbox{god} {cm}$

Now,

$\text{Curved surface area of cone = CSA } = \pi \: rl$

$⇒ CSA = \frac{22}{7} \times 5 \times 13$

$⇒CSA = 204.3 {\sf \colorbox{god} {cm}}^{2}$

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