| Backyard Aquaponics http://byap.backyardmagazines.com/forum/ |
|
| One for the math minds http://byap.backyardmagazines.com/forum/viewtopic.php?f=5&t=8823 |
Page 1 of 1 |
| Author: | earthbound [ Jan 5th, '11, 22:24 ] |
| Post subject: | One for the math minds |
Ok this is just a quick one because I'm failing to remember my high school maths and I'm hoping someone out there can help.. I'm trying to work out how to represent a cubic kilometre volume as a sphere, this is all sort of related to this thread and something I'm trying to work out and graphically represent. I know the volume is 16308.5 km3 i know the formula for spheres is 4/3*Pi*radius3 so now how to I work out the radius of the sphere "x"? Do we put both sides over one and start swapping some numbers around? I'm struggling but I remember this sort of thing can be worked out. I never was much good at algebra.. |
|
| Author: | SolTun [ Jan 5th, '11, 23:48 ] |
| Post subject: | Re: One for the math minds |
http://www.calculatorsoup.com/calculato ... sphere.php |
|
| Author: | SolTun [ Jan 5th, '11, 23:54 ] |
| Post subject: | Re: One for the math minds |
r = 157.31681 m V = 16308500 m3 A = 310999.81223 m2 C = 988.45067 m |
|
| Author: | orcy2010 [ Jan 6th, '11, 05:06 ] |
| Post subject: | Re: One for the math minds |
Just rearrange for the values of interest V=4/3 * pi * R^3 3V/4pi = R^3 CubeRoot(3V/4pi) = R I think. Dont have time to work it out with the numbers you gave. Otherwise, use the calculator Sol posted cheers |
|
| Page 1 of 1 | All times are UTC + 8 hours |
| Powered by phpBB® Forum Software © phpBB Group https://www.phpbb.com/ |
|