Data from two production faces of an open pit iron ore mine are given.
Item description
Face 1
Face 2
Maximum production capacity (tonne/day)
1600
2000
Fe (%)
63
58
Production cost of ores (in INR/tonne)
1500
1200
Ores from two different faces are blended and supplied with Fe grade not less than 60 %. Based on the demand, the combined production is limited to a maximum of 2500 tonne/day. If the selling price of blended iron ores is INR 4500 /tonne, the optimal production from two faces in tonne/day, for maximizing the profit, respectively are