+97 I have a equation, that needs to be differentiated:
d/dr=(pi*r) sqrt r^2 + (360/(pi*r^2))^2
Full working please, I really dont know where to start.
Just some extra infomation:
The equation is the formula for Area=(pi*r) sqrt r^2 +h^2.
The 'h' has change into (360/(pi*r^2)) due to the formula of the volume of a cone: v=1/3 pi*r^2*h, and originallly having the formula: 120=1/3 pi*r^2*h, thus resulting in the (360/(pi*r^2)).
Thanks again guys :).
