A metal feeding trough is in the shape of a triangular prism with one of the faces missing. The base of the trough is an equilateral triangle with sides of length 3.5 feet and a height of 4 feet. If the trough is 15 feet long, how much metal was used to construct the trough?

66.5 ft
119 ft
171.5 ft
194 ft

2 answers

pls! I need an answer soon >n<
Iโ€™m sorry I do not have a complete answer- i just turned my answer to the question in and it was wrong so all I have for you is that it is not C/171.5ft^2, sorry it isnโ€™t much help.