SOLUTION: A gardener has 25 kilos of a mixture of fertilizer and weed killer. If 1 kilo of the mixture is replaced by weed killer, the result is a mixture that is 10% weed killer. What perce

Question 1121904: A gardener has 25 kilos of a mixture of fertilizer and weed killer. If 1 kilo of the mixture is replaced by weed killer, the result is a mixture that is 10% weed killer. What percent of the original mixture was weed killer?
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A sculptor wants to cast a bronze statue from an alloy that is 60% copper. He has 30 kilos of a 40% alloy. How much 80% copper alloy should he mix it with to obtain the 60% copper alloy?
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How many milliliters of pure acid must be added to 150 milliliters of a 30% acid solution to obtain a 40% acid solution?
Found 2 solutions by ikleyn, josgarithmetic:
Answer by ikleyn(52810) (Show Source): You can put this solution on YOUR website!
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ONE and ONLY ONE problem per post.

It is the RULE of this forum.

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comment from student: Hello. I only realized now that it states that you must only have 1 question per post. I'm sorry for violating the rules.
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My response : Glad to hear it . . .

Answer by josgarithmetic(39620) (Show Source): You can put this solution on YOUR website!
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A sculptor wants to cast a bronze statue from an alloy that is 60% copper. He has 30 kilos of a 40% alloy. How much 80% copper alloy should he mix it with to obtain the 60% copper alloy?
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x, number of kilograms of the 80% copper

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