Question : An alloy is made by mixing metal A, costing Rs. 2000/kg, and metal B, costing Rs. 400/kg, in the ratio A : B = 3 : 1. What is the cost (in Rs.) of 8 kg of this alloy?
Option 1: 1600
Option 2: 9800
Option 3: 6400
Option 4: 12800
Correct Answer: 12800
Solution :
Given: Metals A and B mixed in the ratio A : B = 3 : 1
Metal A costs Rs. 2000/kg and metal B costs Rs. 400/kg.
Quantity of metal A in alloy of 8 kg =
Quantity of metal B in the alloy of 8 kg =
Cost of metal A = 2000 × 6 = Rs. 12000
Cost of metal B = 400 × 2 = Rs. 800
Hence, the correct answer is 12800.
SSC CGL Complete Guide
Candidates can download this ebook to know all about SSC CGL.
