Multiple choice

In a mixture of 54 litres, the ratio of milk and water is 7 : 2. How much water must be added to make the mixture ratio 7 : 3?

  1. 4 litres

  2. 3 litres

  3. 2 litres

  4. 6 litres

  5. 5 litres
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Total = 54. Milk:Water = 7:2. Milk = 42, Water = 12. Let x be water added. (42)/(12+x) = 7/3. 126 = 84 + 7x. 42 = 7x. x = 6.

AI explanation

In the initial 54 liters of mixture, the milk to water ratio of 7 to 2 means there are 42 liters of milk and 12 liters of water. If x liters of water are added, the equation for the new ratio is 42 divided by (12 plus x) equals 7 divided by 3. Solving this equation yields 126 equals 84 plus 7x, meaning 7x equals 42 and x is 6 liters.

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