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kirin · Nov 1, 2009, 02:56 AM

I would like some help on this question

Unknown008 · Nov 1, 2009, 04:59 AM

$V = \frac13 \pi r^2 h$

Multiply both sides by 3:

$V\times 3 = \frac13 \pi r^2 h \times 3$

$3V = \pi r^2 h$

Divide by pi on both sides:

$\frac{3V}{\pi} = r^2 h$

Divide by r^2 on both sides:

$\frac{3V}{\pi r^2} =h$

$h = \frac{3V}{\pi r^2}$

Remember that once to try to remove something from one side, be sure to do the same thing on the other side. :)

galactus · Nov 1, 2009, 06:49 AM

The main thing is, never spell ${\pi}$ as 'Pie'. It's Pi

This is a Greek letter, not a pastry.

Nhatkiem · Nov 1, 2009, 10:15 AM

Originally Posted by galactus

The main thing is, never spell ${\pi}$ as 'Pie'. It's Pi

This is a Greek letter, not a pastry.

If only it was a pastry, more students would be interested in it:p.

I've also heard that the pronunciation is "pee" not "pie" for $\pi$ , sine we say "phee" not "fie" for $\phi$

morgaine300 · Nov 2, 2009, 12:56 AM

Originally Posted by Nhatkiem

If only it was a pastry, more students would be interested in it:p.

I've also heard that the pronunciation is "pee" not "pie" for $\pi$ , sine we say "phee" not "fie" for $\phi$

We have people already confusing it with pastry, let alone if we were to pronounce it pee. :D

(Of course, this does come in handy if you're actually making a pie, which would be round.)