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A solution consists of 30 percent of water by weight. After boiling th

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Joined: 02 Sep 2009
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A solution consists of 30 percent of water by weight. After boiling th  [#permalink]

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New post 24 Sep 2018, 01:29
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  25% (medium)

Question Stats:

75% (01:51) correct 25% (02:02) wrong based on 27 sessions

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A solution consists of 30 percent of water by weight. After boiling the solution for 15 minutes, 70 percent water, by weight, was evaporated. There is no weight loss for the other part of the solution. What percent of the solution’s total remaining weight consists of the remaining water?


(A) 500/69 %

(B) 600/69 %

(C) 700/79 %

(D) 900/79 %

(E) 100/69 %

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Joined: 14 Jun 2018
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Re: A solution consists of 30 percent of water by weight. After boiling th  [#permalink]

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New post 24 Sep 2018, 01:47
Total = 100 , water = 30.
70% water evaporated , remaining = 9. Total solution = 100-21 = 79
9 * 100 / 79
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Re: A solution consists of 30 percent of water by weight. After boiling th  [#permalink]

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New post 24 Sep 2018, 04:56
70% of 30% means 21% i.e remaining 79% and 9% of water
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Re: A solution consists of 30 percent of water by weight. After boiling th   [#permalink] 24 Sep 2018, 04:56
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