Question

If 640 litres of milk of 80% concentration is diluted at by the seller by adding some water to it so that milk concentration is reduced between 60% to 70%. Find how much water has been added?
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Answer 1

Step-by-step explanation:

Amount of milk in 80% concentrated milk mixture of 640 litres is = 0.8 *640=512 litres. Let X litres of milk be added to the 80% milk mixture to to get concentration between 65% and 70%. Amount of milk in 65% milk mixture = (65/100 )* (640+X) litres. Above solution, it is X litres of water to be added, not milk. .

Answer 2

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