1.

A house has an old gas furnace that is only 70% efficient . This means that only 70% of the heat produced by the gas goes into heating the house , while 30% of the least is lost . There is a constant charge per unit of gas , and the owner's gas bill is $1,200 per year . The owner is considering replacing the furnace witha new one that is 90 percent energy efficient . To the nearest dollar ,what would the gas bill be per year, assuming that the same amount of heat is required for the house ?

Answer»

896
901
933
947

Answer :C


Discussion

No Comment Found

Related InterviewSolutions