Question

In two alloys, copper and zinc are related in the ratio of 4 : 1 and 1 : 3 10 kg of 1st alloy, 16 kg of 2nd alloy and some of pure copper are melted together An alloy was obtained in which the ratio of copper to zinc was 3 : 2 Find the weight of the new alloy?

A

35 kg

B

45 kg

C

40 kg

D

50 kg

Medium
Solution
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Correct option is A)

In 10 kg of 1st alloy the ratio of copper and zinc = 4:1
Copper  Zinc  In 16 kg of 2nd alloy the ratio of copper and zinc = 1:3
Copper  Zinc 
Let x kg be the amount of pure copper added Given Copper : Zinc = 3 : 2 in the new alloy, i.e. (8 + 4 + x) : (2 + 12) = 3 : 2

Weight of the new alloy = (8 + 4 + 9 + 2 + 12) = 35 kg

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