P and Q are two alloys of aluminium and copper prepared by mixing metals in the ratio 7 : 2 and 7 : 11…
In 18 units of each alloy: Alloy P (7:2) has \(14\) parts Al and \(4\) parts Cu; Alloy Q (7:11) has \(7\) parts Al and \(11\) parts Cu. Combining equal quantities gives Al :…
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P and Q are two alloys of aluminium and copper prepared by mixing metals in the ratio 7 : 2 and 7 : 11 respectively. If equal quantities of the two alloys are melted to form a third alloy R, then the ratio of aluminium and copper in R is -
Answer and explanation
Correct answer A
In 18 units of each alloy: Alloy P (7:2) has parts Al and parts Cu; Alloy Q (7:11) has parts Al and parts Cu. Combining equal quantities gives Al : Cu = .
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