Question

What’s the volume of the figure below

Answer 1

41.89 cm3

Explanation:

Given : Height = 10 cm

Given: Radius = 2 cm

Find the volume,

The formula for volume is,

V = π(
`r^2`)
`(h)/(3)`

Fill in the formula with the given values,

π ·
`2^2` ·
`(10)/(3)`

= 41.8879.....

Round answer to the nearest hundredth,

(The Rule For Rounding: the last digit is less than 5, keep the previous digit the same. If it's 5 or more then you should round the previous digit up.)

41.8879

7 is more than 5 so bring the 8 up to a 9,

41.89

Therefore the answer is 41.89 cm3.

Answer 2

41.9 cm³ (nearest tenth)

Explanation:

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

Given:

• r = 2 cm
• h = 10 cm

`\begin{aligned}\implies \textsf{Volume} &=\sf (1)/(3) \pi \cdot 2^2 \cdot 10\\\\ & = \sf (1)/(3)\pi \cdot 40\\\\& = \sf (40)/(3)\pi\\\\ & = \sf 41.88790205\:cm^3\end{aligned}`

Therefore, the volume is 41.9 cm³ (nearest tenth)