00:01
I am going to find the radius.
00:04
No, i'm not going to find the radius.
00:06
I'm going to find the volume of a cone.
00:08
So the first thing i'm going to do is i am going to draw my cone.
00:15
And so you'll have to forgive me because i'm not an artist.
00:22
And this will do this cone.
00:25
It says the radius.
00:26
Let's see, i have the radius.
00:29
And it tells me it's five inches.
00:32
You know, i probably can draw this a little bit bigger.
00:34
It's pretty small.
00:36
Let's try this again.
00:38
So there is, there we go.
00:42
So that's a little bit better.
00:45
Five inches.
00:47
And then it tells me about the height, and the height of the cone we have as nine inches.
01:00
And now i'm going to write the formula that i'm going to use.
01:04
So i have the volume formula for a cone, and that is the volume of a cone, is one -third pi -r -squared times the height.
01:26
And i have now to figure out what those values are, the radius and the height.
01:33
Well, fortunately, yeah, i'm given the radius.
01:35
Sometimes you have to find it from the diameter, but this one actually, gives me the radius as five inches...