An alloy contains 32% copper, 40% nickel and rest zinc. Find the mass of the zinc is 1 kg of the alloy.

Explanation

To find the mass of zinc in a 1 kg alloy that contains 32% copper and 40% nickel, we can follow these steps:

### Step 1: Determine the percentage of zinc in the alloy.
The total percentage of all components in the alloy must equal 100%. We know the percentages of copper and nickel, so we can find the percentage of zinc.

\[ \text{Percentage of zinc} = 100\% - (\text{Percentage of copper} + \text{Percentage of nickel}) \]
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