1.

Jugnu, a dishonest milk seller has certain quantity of milk to sell. Find the approximate ratio he should mix water to gain 5% by selling the mixture at the cost price?1). 1 : 102). 1 : 53). 1 : 254). 1 : 20

Answer»

Let Cost PRICE of 100 g milk was 100 UNITS,

Let’s ASSUME that X grams of milk are mixed with (100 – x) grams of WATER.

x + 5% of x = 100

⇒ x + 0.05x = 100

⇒ 1.05x = 100

⇒ x = 100/1.05 = 2000/21
Water = 100 – (2000/21) = 100/21

Ratio of water and Milk = 100/2000 = 1 : 20


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