The answer is 13.
A cuboid has 12 edges. and a cone has one (the base).
The curved part is not counted as an edge.
Hope this helps!
Answer:
(1/2) / (1/12)
(1/2) * (12/1) = 12/2 = 6
x = 180 - 30 - 41 - 67 = 42°
