In the design of an automobile radiator an engineer has a choice of using either
ID: 1854042 • Letter: I
Question
In the design of an automobile radiator an engineer has a choice of using either a brass-copper alloy casting or a plastic molding. Either material provides the same service. However, the brass-copper alloy casting weighs 25 pounds, compared with 20 pounds for the plastic molding.Every pound of extra weight in the automobile has been assigned a penalty of $6 to account for increased fuel consumption during the life cycle of the car. The brass-copper alloy casting costs $3.35 per pound, whereas the plastic molding costs $7.40 per pound.Machining costs per casting are $6.00 for the brass-copper alloy. Which material should th engineer select, and what is the difference in unit costs?Explanation / Answer
n the design of an automobile radiator an engineer has a choice of using either a brass-copper alloy casting or a plastic molding. Either material provides the same service. However, the brass-copper alloy casting weighs 25 pounds, compared with 20 pounds for the plastic molding.Every pound of extra weight in the automobile has been assigned a penalty of $6 to account for increased fuel consumption during the life cycle of the car. The brass-copper alloy casting costs $3.35 per pound, whereas the plastic molding costs $7.40 per pound.Machining costs per casting are $6.00 for the brass-copper alloy. Which material should the engineer select, and what is the difference in unit costs? ============================================================================================================================================================================================= brass-copper alloy casting costs = $3.35 per pound, ============================================================================================================================================================================================= costs per casting= $6.00 for the brass-copper alloy ============================================================================================================================================================================================= cost of brass copper alloy per unit = 3.35+6 = 9.35 ============================================================================================================================================================================================= cost of plastic molding = 7.40 ============================================================================================================================================================================================= whereas the plastic molding costs $7.40 per pound ============================================================================================================================================================================================= difference between the unit costs is 9.35-7.40 = 1.95 dollars ANSWER