Andrew M. answered • 03/27/18

Mathematics - Algebra a Specialty / F.I.T. Grad - B.S. w/Honors

Note that your answer choices did not convert pi to 3.14.. It just left it as π

SA = 2πr

^{2}+ 2πrhCylinder A has a radius of 2 inches and a height of 2 inches:

SA

_{A}= 2π(2)^{2}+ 2π(2)(2) = 8π + 8π =**16π in**^{2}*********************************************

Cylinder B has a radius of 2 inches and a height of 4 inches

SA

_{B}= 2π(2)^{2}+ 2π(2)(4) = 8π + 16π=**24π in**^{2}If you need total surface area as the sum of both cylinders it would be 40π in

^{2}