Multiple choice

$640ml$ of a mixture contains milk and water in ratio $6:2$. How much of the water is to be added to get a new mixture containing half milk and half water?

  1. $360ml$
  2. $320ml$
  3. $310ml$
  4. $330ml$
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Initial: 640 ml, milk = 480 ml, water = 160 ml. Let x be water added. (480) / (160 + x) = 1/1. 480 = 160 + x, so x = 320 ml.

AI explanation

The original mixture contains a total of 8 ratio parts, making each part worth 80 ml, which results in 480 ml of milk and 160 ml of water. Let the water to be added be x ml, establishing the equation 480 divided by the sum of 160 and x equals one half. Solving for x gives 960 on the right side, meaning the water to be added is 320 ml.

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