Estimate the volume in metric units and compute the acual volume of the item:

Oil in a barrel that has a height of 1 m and a diameter of 0.5m

The answer in the book: 0.20mcubed

- Nov 14th 2008, 07:45 PMcamstillI can not get the answer from the book could you please explain
*Estimate the volume in metric units and compute the acual volume of the item:*

*Oil in a barrel that has a height of 1 m and a diameter of 0.5m*

*The answer in the book: 0.20mcubed* - Nov 14th 2008, 07:52 PMmr fantastic
- Nov 14th 2008, 09:58 PMcamstill
So don't you use the formula V=(pi)(rsquared)(l)

and I still don't get that answer - Nov 14th 2008, 11:56 PMILoveMaths07
$\displaystyle V = \pi r^2h $

$\displaystyle r = \frac {d}{2} = \frac{0.5\ m}{2} = 0.25\ m.$

$\displaystyle \Rightarrow V = \pi \times (0.25)^2 \times 1$

$\displaystyle \Rightarrow V = 0.20\ m^3 $ (correct to $\displaystyle 2$ sig. fig.)

I hope that helps. :)

ILoveMaths07. - Nov 15th 2008, 01:23 AMmr fantastic