Question 729310
Surface area of a cylinder (a tube is a cylinder) is 2 times the area of the base plus circumference times height.  Since this is a tube without ends, there is no surface area on the bases.  So the surface area is just area of the base times the height. <P>
The circumference of a circle is pi*d.<P>
SA = pi*d*h = pi*3*7.25 = approximately 68.33 square inches.<P>