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49 litres of milk has 80 % milk concentration . How much water be added to make its concentratio n 70% ?
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- 6 litres
- 7 litres
- 6.5 litres
- 7.5 litres
Correct Option: B
The given milk has 80 % concentration of milk .
Water to be added has 0 % milk concentration .
Final concentration of solution is 70% .
By Alligation Rule ,
So , water should be added to the given milk in the ratio 10 : 70 or 1 : 7 .
| ∴ Quantity of water to be added = | " 49 ; 7 litres | |
| 7 |
