Question
A mixture contains milk and water in the ratio of 3:2
respectively. If 20 litres of milk and 20 litres of water are added to this mixture, then respective ratio of milk and water changes to 10:7, respectively. Find the initial quantity of the mixture. STSolution
Let, amount of milk and water in mixture be 3x litres and 2x litres respectively. According to question, ⇒ (3x + 20): (2x + 20) = 10:7 ⇒ 21x + 140 = 20x + 200 ⇒ 21x – 20x = 200 – 140 ⇒ x = 60 So, initial quantity of mixture = 60 × (2 + 3) = 300 litres
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