Question

An alloy is to contain copper and Zinc in the ratio 9:4. Find the quantity of Zinc to be melted with 2 whole 2/5 kg of copper, to get desired alloy
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Answer 1

Answer:

1 whole 1/15 kg

Step-by-step explanation:

Ratio of copper and zinc = 9:4

Quantity of copper in alloy = 2 whole 2/5 kg ( 12/5 kg)

Let the quantity of zinc in alloy be Y.

9:4 :: 12/5 : Y

9 x Y = 12/5 x 4

Y = 4 x 12/9 x 5

   = 16/15 = 1 whole 1/5 kg