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好吧问答库 > 一杯盐水180克一支盐和水的比是1:8这杯盐水的含盐率是多少如果要使含盐率变成？

一杯盐水180克一支盐和水的比是1:8这杯盐水的含盐率是多少如果要使含盐率变成？

10％，需要加水多少克

2025年03月14日 07:25

有3个网友回答

网友（1）：

180克盐水中含盐:
180×1/(1+8)＝20克
含盐率达到10%后盐水的总重量是:
20÷10%＝200克
需要加水:200－180＝20克

网友（2）：

一杯盐水180克一支盐和水的比是1:8这杯盐水的含盐率是1/（8+1）
如果要使含盐率变成？
10％，需要加水为a
（180X1/9）/（180+a）=10%

网友（3）：

400×1/（1+19）÷5%-400
=20÷4%-400
=500-400
=100克
要加水100克

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