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The cost, in dollars, for an appliance repair at a certain company is 1.2p + 20h, where p is the wholesale price of the parts, i
The cost, in dollars, for an appliance repair at a certain company is 1.2p + 20h, where p is the wholesale price of the parts, i
admin
2009-05-19
18
问题
The cost, in dollars, for an appliance repair at a certain company is 1.2p + 20h, where p is the wholesale price of the parts, in dollars, and h is the number of hours it takes to repair the appliance. What is the cost of repairing an appliance if the wholesale price of the parts is $15 and it takes 2 hours to repair it?
选项
A、$12
B、$18
C、$20
D、$40
E、$58
答案
E
解析
某公司一设备的修理成本,以美元计,为1.2p+20h,其中p是零件的批发价格(以美元计),h是修理设备所用的小时数。如果零件的批发价是15美元,并且花了2小时修理,那么修理这个设备的成本是多少?
解:本题的正确答案为(E)。解答该题时,只要把数据代入题中所给的公式即可:1.2×15+2×20=58
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