Question 1156114
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The best way is to look into your textbook and to learn from there.



            surface area = {{{pi*r^2*h}}} = {{{pi*5^2*9}}} = {{{pi*25*9}}} = {{{225*pi}}} square inches .



Memorize the formula.



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But you are not alone in this world (!)


For the surface area of major solids see this link


&nbsp;&nbsp;&nbsp;&nbsp;- <A HREF=https://www.algebra.com/algebra/homework/Surface-area/LESSONS-on-Surface-Area-of-3D-SOLID-BODIES.lesson>Surface area of 3D solid bodies</A>


https://www.algebra.com/algebra/homework/Surface-area/LESSONS-on-Surface-Area-of-3D-SOLID-BODIES.lesson


and enjoy (!)