A) 3 : 10
B) 3: 7
C) 10: 3
D) 7: 3
Correct Answer: A
Solution :
In first alloy, zinc \[=\frac{1}{3}\] In second alloy, zinc \[=\frac{2}{5}\] In the new alloy, zinc \[=\frac{5}{13}\] By the rule of Alligation, \[\therefore \] Required ratio \[=\left( \frac{2}{5}-\frac{5}{13} \right):\left( \frac{5}{13}-\frac{1}{3} \right)\] \[=\frac{26-25}{65}:\frac{15-13}{39}\] \[=\frac{1}{65}:\frac{2}{39}=\frac{1}{5}:\frac{2}{3}=3:10\]You need to login to perform this action.
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