Subject
Quantitative Aptitude
Topic
Ratio
Gold is 19 times as heavy as water and copper is 9 times as heavy as water in what ratio should this be mixed to get an alloy r 15 times as heavy as water :
Gold is 19 times as heavy as water and copper is 9 times as heavy as water in what ratio should this be mixed to get an alloy r 15 times as heavy as water :
ক)
3:2খ)
1:3গ)
2:3ঘ)
1:4Explanation
Let, the mass of 1 volume unit of water be 1. Then 1 volume unit of gold has mass 19, and 1 volume unit of copper has mass 9. Now let g be the volume of gold used, and let c be the volume of copper. The total mass divided by the total volume is the density. (19g + 9c)/(g + c) = 15 19g + 9c = 15g + 15c 4g = 6c 2g = 3c g/c = 3/2 The volume ratio is 3:2.Related questions
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