Question 1197280
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I think the description is sufficiently clear.  I see a tall cylindrical cake, originally with a radius of 4 inches and a height of 12 inches, from which several slices have been removed, leaving bases that are 135-degree sectors of the original circular bases.  The surfaces of the "cake" are these:
(1) 2 bases that are 135-degree sectors of circles with radius 4;
(2) the curved lateral surfaces of the cake; and
(3) 2 rectangular surfaces where the cuts were made.<br>
The areas of those surfaces are<br>
(1) {{{2(135/360)(pi)(r^2)=(3/4)(pi)(16)=12pi}}}
(2) {{{(135/360)(2pi)(r)(h)=(3/8)(2pi)(4)(12)=36pi}}}
(3) {{{2(4)(12)=96}}}<br>
The total surface area of the solid is {{{48pi+96}}}<br>
You can put that result in the prescribed form and answer the question.<br>