Find the surface area of f(x)=5x, x[0,2] revolving around the x-axis. If rotated around the x-axis, the shape created is a cone, so I figured if I wanted the area I could just use the equation for a triangle, but I'm not sure if that's correct.

Question

irishboy123 · Answer

google and you will find the formula for the surface area of a cone.  
eg $SA = πr2 + πrl$
but make sure you know what the letters stand for before proceeding

irishboy123 · Answer

typo, make that:$$SA = πr^2 + πrl$$