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Gold is 19 times as heavy as water and Copper is 9 times as heavy as water. Calculate the ratio in which these two metals should be mixed so that the mixture is 15 times as heavy as water.

A. 40

B. 41

C. 42

D. 43

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Explanation: Using Alligation rule: Gold (19) | Copper (9) Mix (15) Diff: |15-9|=6 | |19-15|=4 Ratio = 6:4 = 3:2. (Options provided do not match calculation).

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Gold is 19 times as heavy as water and Copper is 9 times as heavy as water. Calculate the ratio in which these two metals should be mixed so that the mixture is 15 times as heavy as water.