Elongation of a cone (replaced by n circular cylinders)

I have this problem which asks to find the elongation of a cone given by the equation, but replaced with n circular cylinders.

I have this for the code but I don't know how to incorperate the n ciruclar cylinders part, I was wondering if someone could help me. Also, how would I go about finding the % error and graphing the results? Thank you in advance.

%Load P applied at a certain distance. Also define other variables
p=40;
d=0:1:50;
L = 1
c = .25
E = .00016
%Elongation of the cylinder as given by the equation
(P*L)/(2*3.141*c^2*.E)

[James Tursa]

%Load P applied at a certain distance. Also define other variables
P=40;
d=0:1:50;
L = 1;
c = .25;
E = .00016;
%Elongation of the cylinder as given by the equation
(P*L)/(2*pi*c^2*E)

ans = 6.3674e+05

Can you explain more what this elongation is?