How much water must be added to a bucket which contains 40 liters of milk at…
2024
How much water must be added to a bucket which contains 40 liters of milk at the cost price of Rs. 3.50 per liter so that the cost of milk reduces to Rs. 2 per liter?
- A.
25 liters
- B.
28 liters
- C.
30 liters
- D.
35 liters
Attempted by 16 students.
Show answer & explanation
Correct answer: C
Solution:
Total cost of the milk = 40 × Rs.3.50 = Rs.140.
Let x be the litres of water to add. New total volume = 40 + x litres.
Desired cost per litre = Rs.2, so total cost divided by total volume equals 2: 140 / (40 + x) = 2.
Solve: 40 + x = 140 / 2 = 70, so x = 70 − 40 = 30.
Answer: 30 litres