Gold is 19 times as heavy as water and copper is 9 times as heavy as water. In what ratio should these be mixed to get an alloy 17 times as heavy as water? Choose the correct choice from the following answers
A) 1:2 B) 3:2 C) 4:1 D) 5:2 E) 6:5
G = 19W   4:1 = 9W   Let 1gm of gold mixed with x gm of copper to get 1+x gm of the alloy   1gm gold + x gm copper = x+1 gm of alloy   19W+9Wx = x+1 * 17W   19+9x = 17(x+1)   x = 1/4   Ratio of gold with copper = 1:1/4 = 4:1   Answer is 4:1
<result>C</result>
Gold is 19 times as heavy as water and copper is 9 times as heavy as water. In what ratio should these be mixed to get an alloy 17 times as heavy as water?