Triangular prisms have their own formula for finding surface area because they have two triangular faces opposite each other. The formula A=12bh is used to find the area of the top and bases triangular faces, where A = area, b = base, and h = height.
. Rates: Ryan: 1 hole per 5 hours Castel: 1 hole per 6 hours . Let x = time if working together then x(1/5 + 1/6) = 1 x(6 + 5) = 30 11x = 30 x = 30/11 x = 2.7273 hours or x = 2 hours and 44 minutes
