GMAT数学一题.很简单但是和答案不同.a recipe for soda requires w liters of water for every liter of syrup.if soda is made according to this recipe using m liters of syrup,and sold for j dollars a liter ,what will be the gross profit if syrup costs k dollars a liter and water costs nothing?
GMAT数学一题.很简单但是和答案不同.
a recipe for soda requires w liters of water for every liter of syrup.if soda is made according to this recipe using m liters of syrup,and sold for j dollars a liter ,what will be the gross profit if syrup costs k dollars a liter and water costs nothing?
翻译；食谱的苏打水需要w升水来每公升的糖浆。如果苏打是根据这个食谱使用m升的糖浆,和出售的j美元一升,什么将是毛利润如果糖浆成本k美元一公升和水成本为零?
the gross profit equals the gross dollars sold for minus the gross costs of the syrup.
Gross profit=m*w*j-m*k
If the volum of 1 liter syrup added with 1 liter water is 2 liter,soda using m liters of syrup is (m*w+m) liters,which solds j*(m*w+m) dollars.Since the cost of the soda is m*k,the gross profit is j*(m*w+m)-mk,i.e.m*(j*w-k+1).
mwj-mk
答案是什么？是不是要单位换算呀？