An industrial building contains 3000 kg of combustible materials, in dry state, distributed over three rooms of area 100 m2, 500 m2 and 300 m2 each, in a proportion of 30%, 50% and 20% of the contents, respectively. Calorific value of the material is 4400 kCal/kg. The Total fire load of the rooms is equal to _______ kCal/m2.

• A. 6160
• B. 22000
• C. 15400
• D. 61600