Question

Shakespeare is buiding a shed with a square base measuring x feet by x feet, and which is h feet high. He wants the volume of the shed to be 160 ft3. Concrete for the base costs $3 per ft2. The materials for each of the four sides cost $2 per ft2. The flat roof will cost $7 per ft2.

Answer 1

nevermind i figured it out
c= 10x^2+8xh
160= (x^2)h
x=4, h= 10
The minimal cost to build the shed is $480