Answer:
Area of the rectangles on either side of the wedge = 2×radius×height=2×18=36sqcm.
Explanation:
Area of the sector (top and bottom) = 2×
360
45
×π×6
2
=9πsqcm
Curved area of the cylinder =
8
2π×6×3
=
2
9
πsqcm.
Total area of each wedge =
2
9
π+9π+36=36+
2
27
π=
2
9
(3π+8)sqcm