Surface area = 2 (22/7) r^2 + 2 (22/7) r h.
Insert values and solve.
the surface area of a cylinder with a radius of 21 cm and a height of 42 cm. Use 22/7 for pi
.
3 answers
SA = 2(pi * r^2) + 2(pi * h)
SA = 2[(22/7 * 21^2)] + 2[(22/7) * 42)]
http://math.about.com/od/formulas/ss/surfaceareavol_3.htm
SA = 2[(22/7 * 21^2)] + 2[(22/7) * 42)]
http://math.about.com/od/formulas/ss/surfaceareavol_3.htm
SA = 2(pi * r^2) + 2(pi * r * h)
SA = 2[(22/7 * 21^2)] + 2[(22/7) * 21 * 42)]
SA = 2[(22/7 * 21^2)] + 2[(22/7) * 21 * 42)]