This is a good question where the logic of mixtures is used with percentages
The current cost of Milk is 12 Rs/L . After adding water, it should get 10.5/L
Now in the present scenario, 10.5 Rs will get 10.5/12 = 7/8 litres of milk
If a litre milk costs Rs 10.5 then it would contain 7/8 Litres of milk only and the rest would be water (10.5 is the cost of Milk, which would be same even with adulteration)
Ratio of M:W = 7:1
We know that total milk is still 28 l. Let the new volume with water be x
Milk = 7/8 * x = 28
x = 32 , Therefore water = 4
How much water must be added to 28L milk costing rs 12 per litre, so that the value of the mixture will be Rs 10.5 per Litre
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This is a good question where the logic of mixtures is used with percentages
The current cost of Milk is 12 Rs/L . After adding water, it should get 10.5/L
Now in the present scenario, 10.5 Rs will get 10.5/12 = 7/8 litres of milk
If a litre milk costs Rs 10.5 then it would contain 7/8 Litres of milk only and the rest would be water (10.5 is the cost of Milk, which would be same even with adulteration)
Ratio of M:W = 7:1
We know that total milk is still 28 l. Let the new volume with water be x
Milk = 7/8 * x = 28
x = 32 , Therefore water = 4
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