Two alloys containing copper and zinc are in the ratios 5:8 and 5:3. If they are melted in equal quantities. The ratio of Zinc to copper in the resultant alloy is?

103:105

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114:120

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123:154

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none of these

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Solution

The correct option is A 103:105
option (a)

$\frac{C o p p e r}{Z i n c} = \frac{\frac{5}{13} + \frac{5}{8}}{\frac{3}{13} + \frac{3}{8}} = 105 : 103$

Solving using alligation

With respect to zinc

Now use answer options to get the value of x =103:105

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Two alloys containing copper and zinc are in the ratios 5:8 and 5:3. If they are melted in equal quantities. The ratio of Zinc to copper in the resultant alloy is?

The correct option is A 103:105option (a) CopperZinc=513+58313+38=105:103 Solving using alligation With respect to zinc Now use answer options to get the value of x =103:105

The correct option is A 103:105
option (a)

$\frac{C o p p e r}{Z i n c} = \frac{\frac{5}{13} + \frac{5}{8}}{\frac{3}{13} + \frac{3}{8}} = 105 : 103$

Solving using alligation

With respect to zinc

Now use answer options to get the value of x =103:105