...2cx+c[(10000/x) + x)? A rectangular floor area of a Bestlife gym must be 5000 m2. Three walls will be cement blocks, while the fourth wall will be glass. The cost of the glass wall is two times the cost of constructing a cement-block wall. The total cost of the walls is given by
C(x) = 2cx+c[(10000/x) + x)?

where c is the cost of constructing 1 metre of cement-block wall, and x is the length of the glass wall. Determine the dimensions that will minimize the cost of the gym.