Re: 10 litres are removed from 80 litres of solution of milk and water hav
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06 Jun 2020, 23:47
I have checked and rechecked but I am getting 49/79 as the ratio of Milk:Water in the resultant solution.
Initial qty of milk in the 80 L solution is (80/7)*4=320/7. Qty of milk remaining after 10 L of solution is removed and replaced with 10 L of water three times is (320/7)*(7/8)^3=(5*49)/8. Since the qty of solution remains unchanged, the qty of water becomes 80-(5*49)/8. Therefore, the ratio of Milk to Water in the final solution is 49/79. IMO, had the question asked for the FRACTION of Milk in the final solution then the answer would be 49/(79+49)=49/128.