Percentage of Zinc + Tin = 15 nbsp;+ 45 nbsp;= 60%...(0.5 marks) ∴ Percentage of Iron = 100 60 nbsp;= 40%...(0.5 marks) Quantity of Iron in 2 kg of al ...

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Standard VI

Mathematics

Converting a Given Percentage into a Fraction or a Decimal

An alloy cont...

Question

An alloy contains $15$ Zinc, $45$ Tin and the rest Iron. Find the quantity of Iron in $2$ kg of this alloy.

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Solution

Percentage of Zinc $+$ Tin $= 15 + 45 = 60 %$ ...(0.5 marks)

$∴$ Percentage of Iron $= 100 - 60 = 40 %$ ...(0.5 marks)

Quantity of Iron in $2$ kg of alloy $= \frac{40}{100} \times 2 = \frac{80}{100} = 0.8$ kg...(1 mark)

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An alloy contains 15 Zinc, 45 Tin and the rest Iron. Find the quantity of Iron in 2 kg of this alloy.

Percentage of Zinc + Tin =15+45=60%...(0.5 marks) ∴ Percentage of Iron =100−60=40%...(0.5 marks) Quantity of Iron in 2 kg of alloy =40100×2=80100=0.8 kg...(1 mark)

An alloy contains $15$ Zinc, $45$ Tin and the rest Iron. Find the quantity of Iron in $2$ kg of this alloy.

Percentage of Zinc $+$ Tin $= 15 + 45 = 60 %$ ...(0.5 marks)

$∴$ Percentage of Iron $= 100 - 60 = 40 %$ ...(0.5 marks)

Quantity of Iron in $2$ kg of alloy $= \frac{40}{100} \times 2 = \frac{80}{100} = 0.8$ kg...(1 mark)