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The ratio of copper and nickel by weight...

The ratio of copper and nickel by weight in the two alloys X and Y are 2:7 and 5:4. How many kilogram of the alloy X and Y are required to make 42 kg of new alloy Z in Which the ratio of copper and nickel is same?

A

6 kg and 36 kg

B

10 kg and 32 kg

C

7 kg and 35 kg

D

none of these

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The correct Answer is:
C
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