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标题: gwd 11-12 [打印本页]

作者: shelleyzhdai 时间: 2007-9-2 15:46 标题: gwd 11-12

Q12:

A certain liquid leaks out of a container at the rate of k liters for every x hours. If the liquid costs $6 per liter, what is the cost, in dollars, of the amount of the liquid that will leak out in y hours?

A. ky/ 6x

B. 6x/ky

C. 6k/xy

D. 6ky/x

E. 6xy/k

请教这题如何列出算式的呢？

作者: dingzhiyin19 时间: 2007-9-2 19:15

K/x

K/x * y

K/x * y * 6

作者: shelleyzhdai 时间: 2007-9-3 06:43

那k/x 表示速率了？我真蠢。。

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