2*(4*7 + 7*15 + 15*4) = 386 square units.
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If the radius of the hemispheres is 4, then that leave 4 units for the length if the straight part of the cylinder. Total surface area = surface area of 1/2 sphere of radius 4 + lateral surface area of cylinder of radius 4 and height 4 + surface area of 1/2 sphere of radius 4. = surface area of sphere of radius 4 + lateral surface area of cylinder of radius 4 = 4*3*pi*43 + pi*42*4 = 469.1 cubic units.
Surface area of a sphere = 4*pi*radius2 Surface area = 4*pi*112 = 1520.530844 square units.
A cylinder with radius 4 and height 12 has a total surface area of 402.12 units2
Surface area of box: (2*6*4)+(2*6*2)+(2*4*2) = 88 square inches of gift wrap will be needed