Someone help with math please
Favorites|Homepage
Subscriptions | sitemap
HOME > > Someone help with math please

Someone help with math please

[From: ] [author: ] [Date: 12-04-30] [Hit: ]
......
the formula for the surface area of a cylinder is: A=2πrh+2πr^2 If the height of the cylinder is 10 inches, and the surface area is 200 sq. inches, determine the length of the radius

-
200 = 20πr+2πr^2
πr^2+10πr = 100
r^2+10r = 100/π
(r+5)^2=[100/π+25]
r = -5 + sqrt[100/π+25]
r = 2.539 inches
1
keywords: please,math,help,with,Someone,Someone help with math please
New
Hot
© 2008-2010 http://www.science-mathematics.com . Program by zplan cms. Theme by wukong .