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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?
- A1 : 10
- B1 : 5
- C1 : 25
- D1 : 20
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CCommunity
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
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