Question

GOLD IS 19 TIMES HEAVIER THAN WATER AND 9 TIMES HEAVIER THAN COPPER. IN WHAT PROPORTION WOULD THE METAL BE 12 TIMES HEAVIER THAN WATER IF THE METAL WAS MIXED??​

Answer 1

Answer:

G = 19W gold is 19 times as heavy as water

C = 9W copper is 9 times as heavy as water

Mixing A pounds of gold with B pounds of copper:

A(G) + B(C) = 15W(A + B)

A(19W) + B(9W) = 15W(A + B)

divide both sides by W

19A + 9B = 15(A + B)

19A + 9B = 15A + 15B

4A = 6B

A = (3/2) * B

for each part of Gold, there needs to be 1.5 parts Copper

Ratio Gold to copper: 1:1.5

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