Question : An alloy contains 30 percent aluminium. What quantity of alloy will have 300 grams of aluminium?
Option 1: 0.8 kg
Option 2: 1 kg
Option 3: 1.2 kg
Option 4: 0.6 kg
Correct Answer: 1 kg
Solution :
Given: Quantity of aluminium = 300 grams
Aluminium content = 30%
Let the weight of the alloy be $x$.
$\therefore$ Aluminium content = quantity of aluminium
⇒ $\frac{30x}{100}=300$
⇒ $x=1000$ grams = $1$ kg
Hence, the correct answer is 1 kg.
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