A manufacturer of briquettes has a contract to make briquettes for barbecuing that are guaranteed to not contain over 10% moisture or 10% ash. The basic material used has this\ analysis: moisture 12. 4%, volatile material 16. 6%, carbon 57. 5%, and ash 13. 5%. To meet the specifications (at their limits) the manufacturer plans to mix with the base material a certain amount of petroleum coke that has this analysis: volatile material 8. 2%, carbon 88. 7%, and moisture 3. 1%. How much petroleum coke must be added per 100 lb of the base material?
