Question

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Answer 1

C

Explanation:

Formula for the volume of a cone :

Volume (cone) = 1/3πr²h

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Given :

⇒ r = 4 units

⇒ h = 21 units

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Solving :

⇒ Volume (cone) = 1/3 × π × (4)² × 21

⇒ Volume (cone) = 16 × 7 × π

⇒ Volume (cone) = 112π units²

Answer 2

`\sf C. \quad 112 \pi \:units^2`

Explanation:

`\textsf{Volume of a cone}=\sf (1)/(3) \pi r^2 h \quad\textsf{(where r is the radius and h is the height)}`

Given:

• radius = 4 units
• height = 21 units

Substituting the given values into the formula:

`\implies \sf Volume=(1)/(3) \cdot \pi \cdot 4^2 \cdot 21`

`\implies \sf Volume=112 \pi \:units^2`