Question

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Answer 1

AnsWer :

21 Cm.

Given :

• Height = 28 Cm.
• Volume of Cone = 12936 Cm³.

Solution :

We have,

$\tt Volume \: o f \: Cone = 12936 \: c {m}^{3} .$

$\tt \longmapsto 12936 = \dfrac{1}{3} \pi {r}^{2} h.$

$\tt \longmapsto \dfrac{12936 \times 3 \times 7}{22 \times 28} = {r}^{2}$

$\tt\longmapsto \dfrac{588 \times 3 \times 7}{ 28} = {r}^{2}$

$\tt \longmapsto 7 \times 3 \times 21 = {r}^{2}$

$\tt \longmapsto 7 \times 3 \times 7 \times 3 = {r}^{2}$

$\tt \longmapsto \sqrt{7 \times 3 \times 7 \times 3} = r$

$\tt \longmapsto r = 21 \: cm.$

Therefore, The value of radius of given cone be 21 Cm.

$\rule{200}3$

Some Information :

Cone,

• TSA => πr( l + r )
• CSA => πrl
• Slant height ( l² ) => r² + h²
• Volume => 1/3 πr²h.

$\rule{90}1$

Note : Figure provide in attachment.

Answer 2

Answer:

radius of cone =21cm

Step-by-step explanation:

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