sa of a cylinder is just the circumference of a circle multiplied by the length of the cylinder, then add 2*the area of the circle for the top and bottom of the cylinder
which = [tex] 2\pi r ^{2} + \pi dh[/tex]
[tex]2 \pi r ^{2} = 2*3.14*20 ^{2} [/tex] = 2512
[tex] \pi dh = 3.14*40*60[/tex] = 7536
2512 + 7536 = 10048
