Question

Find the surface area of a cylinder with a diameter of 40 and a height of 60. use 3.14 for ?. round your answer to the nearest tenth.

Answer 1

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 = $2\pi r ^{2} + \pi dh$
$2 \pi r ^{2} = 2*3.14*20 ^{2}$ = 2512
$\pi dh = 3.14*40*60$ = 7536
2512 + 7536 = 10048