An ingot is made up of copper, zinc and tin. It contains copper and zinc in the ratio 3:5,
while the ratio of copper and tin is 5: 3. What is the fraction of tin in the ingot?
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Answer:
copper:zinc
3. :. 5
copper: tin
5. :. 3
making copper equal in both ratio
copper:zinc
3. :. 5. *5
15. 25. (1)
copper: tin
5. :. 3. *3
15. 9. (2)
merging 1 n 2
copper : zinc. : tin
15. :. 25. :. 9
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