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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?

Correct answer: C. 30 liters

  • A. 25 liters
  • B. 28 litres
  • C. 30 liters
  • D. 35 liters

Explanation

The 40 litres of milk originally cost 40 litres x Rs.3.50 per litre = Rs.140. If the final cost is Rs.2 per litre, the total mixture must be Rs.140 / Rs.2 per litre = 70 litres, so water added is 70 litres - 40 litres = 30 litres. The likely mistake is option b, 28 litres, from dividing or subtracting the given figures incorrectly.

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