An alloy is made by mixing metal A costing Rs. 2000 per kg and metal B costing Rs. 400 per kg in the ratio A : B = 3 : 1. What is the cost (in Rs.) of 8 kg of this alloy?
A. 1600
B. 9800
C. 6400
D. 12800
Answer: Option D
Solution (By Examveda Team)
Metal A = 2000 per kgMetal B = 400 per kg
∴ Cost of 8 kg of alloy = By mixing 6 kg metal A and 2 kg metal B
Cost = 6 × 2000 + 2 × 400 = Rs. 12,800
This Question Belongs to Arithmetic Ability >> Alligation
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