A commodity is made of two metals, A and B, which cost ₹35 per kg and ₹40 per kg, respectively, in the ratio of 2 : 3. What is the cost (in ₹) of 12 kilograms of this commodity?
Show answer & explanation
Correct answer: D
Explanation
The correct answer is option 4 i.e 456.
Weighted cost per kg = (2 × 35 + 3 × 40) ÷ (2 + 3) = (70 + 120) ÷ 5 = 38
For 12 kg: 12 × 38 = 456