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Question
Ten gram of an alloy of metals A and B contains 7.5 gm of metal A and the rest is metal B. Find the ratio between:
- the weights of metals A and B in the alloy.
- the weight of metal B and the weight of the alloy.
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Solution
Total weight of A and B metals = 10 gm A’s weight = 7.5 gm B’s weight = 10 – 7.5 = 2.5 gm
(i) Ratio between A and B is 7.5 : 2.5
`= 75/10 : 25/10 = 3:1`
(ii) Ratio between B and total alloy
`= 2.5 : 10 = 25/10 : 10`
⇒ 25 : 100 = 1 : 4
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