一农技人员现有208千克含盐量为40%的盐水,若要配备含盐量为32%的盐水312千克,那么需加入的盐和水比例为多少?A.4:25 B.25:4 C.4...

作者: tihaiku 人气: - 评论: 0
问题 一农技人员现有208千克含盐量为40%的盐水,若要配备含盐量为32%的盐水312千克,那么需加入的盐和水比例为多少?
选项 A.4:25 B.25:4 C.4:21 D.21:4
答案 C
解析 需加入的盐和水的浓度为X%,加入的盐和水的质量为312﹣208=104千克二运用十字交叉法:

相关内容:人员,现有,208千克,含盐量,盐水,312千克,比例,C.4...

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