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Wednesday, August 24, 2022

A and B are two alloys of gold and copper prepared by mixing metals in the proportions 7 : 2 and 7 : 11 respectively. If equal quantities of the alloys are melted to form a third alloy C, proportion of gold and copper in C will be

A and B are two alloys of gold and copper prepared by mixing metals in the proportions 7 : 2 and 7 : 11 respectively. If equal quantities of the alloys are melted to form a third alloy C, proportion of gold and copper in C will be
A5 : 7
B5 : 9
C9 : 5
D7 : 5

Correct answer is: 7 : 5

Explanation:

Gold in C = (79+718)

=2118=76

Copper in C =  (29+1118)

=1518=56

Gold : Copper = 76:56

= 7 : 5

Nithin
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