Question 824216
Make a formula for surface area of a cylinder.

h = height
d = diameter, 36 cm
r = radius, 18 cm
A = surface area, 1.3 m^2


{{{A=2(pi*r^2)+h*2*pi*r}}}
{{{A=2*pi*r^2+2*h*pi*r}}}
'
We wanted to make a decision about h, so solve for h:
{{{A-2*pi*r^2=2*pi*r*h}}}
{{{highlight_green(h=(A-2*pi*r^2)/(2*pi*r))}}}------formula for h, in terms of RADIUS, not diameter.   Arbitrary choice.


substitute values  .  
{{{highlight(h=(1.3-2*pi*0.18^2)/(2*pi*0.18))}}}