Gold is 19 times as heavy as water and copper 9 times as heavy as water. what is the ratio in which these two metals shall be mixed so that the mixture is 15 times as heavy as water?
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Step-by-step explanation:
total gold = 19 times
no of heavy as water and copper = 9 times
no of mixed two metals the mixture = 15 times
no of mixture = _19__=1
15
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