A net of a rectangular prism. the rectangular base has a length of 7 feet and height of 6 feet. another rectangle has a length of 7 feet and height of 5 feet. another rectangle has a length of 7 feet and height of 5 feet. the triangles have a base of 6 feet and height of 4 feet. the dimensions of a water trough are shown. the trough is open at the top. what is the surface area of the outside of the trough? square feet