Question

An alloy of copper and zinc contains 45% copper and the rest is zinc find the weight of zinc in 2 kg of the alloy

Answer 1

Given,

An alloy of copper and zinc contains 45% of copper.

Rest of the alloy contains zinc.

The weight of the given amount of alloy is 2 kilograms.

To find,

The weight of the zinc in the given amount of alloy.

Solution,

Let,the total amount of alloy = 100%

So,the amount of zinc in the alloy = 100% - amount of copper = 100% - 45% = 55%

Now,we have to calculate the weight of zinc in the given amount of alloy,by using the following mathematical formula,

Amount of zinc = Weight of total alloy × Percentage of zinc/100 = 2 × 55/100 = 1.1 kilograms

Hence,there is 1.1 kilograms of zinc in the given amount of alloy.

Answer 2

Step-by-step explanation:

percentage of zinc contain is 45% in 20 kg

amount of content = given given percentage × given quantity / 100

substituting values

amount amount of content = 45×20/100

amount of content = 9 kg

weight of zinc = 9kg

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