An alloy contains zinc, copper and tin in the ratio 2:3:1 and an other contains copper, tin and lead in the ratio 5:4:3. If equal weights of both alloys are melted together to form a third alloy, then the weight of tin per kg in the new alloy will be:
Answer & explanation
Correct answer: option 2
Let the weight of the first alloy be 12 kg,
zinc = 4kg, copper = 6kg, tin = 2kg
Similarly, if the weight of second alloy is also 12 kg
copper = 5kg, tin = 4kg, lead = 3kg
Total weight of the third alloy = 24kg
weight of tin = 4 + 2 = 6kg
weight per kg = \(\frac{6}{24}\) = \(\frac{1}{4}\) kg