1.

A milkman bought milk at Rs. 2.50 per litre. He mixed 4 litres of water with the milk and sold it at Rs. 2.50 per litre, earning a profit of 5%. What was the quantity of milk that he had?1). 65 litres2). 80 litres3). 45 litres4). 56 litres

Answer»

LET the quantity of milk BOUGHT be x litres

Cost of milk = RS. 2.50 per litre

∴ Total cost of milk = 2.50 × x = Rs. 2.5x

Water added = 4 litres

∴ Total quantity of the mixture = (4 + x) litres

∴ Total selling PRICE of the mixture = 2.50 × (4 + x) = Rs. (10 + 2.5x)

Now, gain = 5%

∴ Gain = (Gain % × Cost price)/100

⇒ Selling price – Cost price = (5 × 2.5x)/100

⇒ (10 + 2.5x) – 2.5x = 2.5x/20

⇒ 10 = 2.5x/20

⇒ 200 = 2.5x

⇒ x = 80 litres


Discussion

No Comment Found

Related InterviewSolutions