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OG12, Problem solving sample questions, 195, solution?请大牛指点!多谢

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楼主
发表于 2009-10-15 20:36:00 | 只看该作者

OG12, Problem solving sample questions, 195, solution?请大牛指点!多谢

a store currently charges the same price for each towel that it sells. if the current price of each towel were to be increased by $1, 10 fewer of the towels could be bought for $120, excluding sales tax.

what is the current price of each towel?

对划线句子的理解是解题的关键,og有解答,但是有些看不懂!

请各位大牛不吝赐教!谢谢!

沙发
发表于 2009-10-15 21:12:00 | 只看该作者

答案是3吧

题意是商店卖的每条毛巾的价钱是相同的,如果把现价+1,那么用120块钱就会少买到10条,问原价

设原价是p,

价钱是p时,120元能买到的毛巾数为n

则有p*n=120

(p+1)(n-10)=120

解得p=3,n=40

故原价是3 每条

板凳
 楼主| 发表于 2009-10-28 05:50:00 | 只看该作者

多谢仁兄!

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