A milkman buys 20 litres of milk from a dairy at the cost of Rs. 50 per litre.…
2023
A milkman buys 20 litres of milk from a dairy at the cost of Rs. 50 per litre. He also purchases some mineral water at the rate of Rs. 20 per litre and adds it to the milk. He then sells the adulterated milk at the rate of Rs. 60 per litre and makes a profit of Rs. 400. What is the amount of water he added to the milk ?
- A.
10 litre
- B.
8 litre
- C.
5 litre
- D.
4 litre
Attempted by 12 students.
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Correct answer: C
First, calculate the cost of milk: 20 litres × Rs. 50 = Rs. 1000.
Let x be the litres of water added at Rs. 20 per litre, making total cost 1000 + 20x.
The selling price is Rs. 60 per litre for the total volume (20 + x). Set up the profit equation: 60(20 + x) - (1000 + 20x) = 400.
Simplify to find x equals 5 litres.