In alloys A and B, the ratio of lead to tin is 5 : 3 and 3 : 1, respectively. 80 kg of alloy A and 100 kg of alloy B are mixed together to form a new alloy. What is the amount of tin (in kg) in the new alloy?
Show answer & explanation
Correct answer: B
Explanation
The correct answer is Option 2 i.e. 55.
Given that
The ratio of lead to tin in alloy A = 5 : 3
The ratio of lead to tin in alloy B = 3 : 1
Hence, tin in 80 kg of alloy A = × 80 = 30 kg
Tin in 100 kg of alloy B = × 100 = 25 kg
Hence, the amount of tin in the new alloy = 30 + 25 = 55 kg.