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OpenStudy (anonymous):
Gold is 19 times heavy as water and copper is 9 times as heavy as water. The ratio in which these two metals be mixed so that the mixture is 15 times as heavy as water, is ?
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OpenStudy (anonymous):
9x+19y=15z 9*2+19*3=75 which is divisible by 15 so they should be mixed in 2:3 ratio. Get back for further queries
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