The formula for the surface area of a cylinder is A=2πrh+2π(r squared). I find it easiest to multiply pi times 2 instead of any other number which is 6.28. The first part is 2πrh, so you multiply pi (3.14) times 2 (6.28) then you multiply radius (39) times height (33), equaling 1,287. then you multiply that (1,287) by 6.28, Equaling 8,082.36. Now we move onto the second part 2πrsquared. first you square the radius(39X39=1,521) now multiply by 6.28. Equaling 9,551.88. now you add the 2 sums. (9,551.88+8,082.36=17,634.24)
