Subject: General Aptitude · Chapter: Profit and Loss · Exam: 2007 · Marks: · Difficulty:
A milkman cheats his customer in two ways. He mixes 10\% water in pure milk and increases the price of milk by 10\%. He purchases 20 kg pure milk at a rate of ₹ 15 per kg. His total profit by selling it is
(a)₹ 40
(b)₹ 63
(c)₹ 80
(d)₹ 100
Answer
Answer (as printed): B
Explanation
C.P. of 20 kg milk $=₹(20 \times 15)=₹ 300$. Quantity of water added = 10\% of 20 kg = 2 kg. S.P. of 1 kg mixture = 110\% of ₹ $15=₹ 16.50$. S.P. of 22 kg mixture $=₹(22 \times 16.50)=₹ 363$. $$\text { ∴ } \text { Profit }=₹(363-300)=₹ 63 .$$
Explanation as extracted from the printed page; notation may be imperfect.