A chemist prepares 60 liters of antiseptic solution by mixing two liquids, 'A' and 'B', in the ratio 2:3. If the cost of 'A' is ₹45/liter and 'B' is ₹30/liter, what is the average cost per liter of the final solution?
Show answer & explanation
Correct answer: A
Explanation
The correct answer is option 1 i.e. ₹36.
A : B = 2 : 3
Total = 60 liters
⇒ 2x + 3x = 60
⇒ 5x = 60
⇒ x = 12
A = 2x = 24 liters
B = 3x = 36 liters
Cost of A = 24 × 45 = ₹1080
Cost of B = 36 × 30 = ₹1080
Total cost = 2160
Average cost per liter = = ₹36 per liters