How much water must be added to 68 litres of milk at 1 1⁄2 litres for 20 so as to have a mixture worth 10 2⁄3 a litre? Choices
A) 10 litres
B) 17 litres
C) 15 litres
D) 18 litres
E) None of these
C.P. of 1 litre of milk = (20 × 2⁄3) = 40⁄3   ∴ Ratio of water and milk = 8⁄3 : 32⁄3 = 8 : 32 = 1 : 4   ∴ Quantity of water to be added to 68 litres of milk   = (1⁄4 × 68) litres = 17 litres.   Answer 17 litres
<result>B</result>
How much water must be added to 68 litres of milk at 1 1⁄2 litres for 20 so as to have a mixture worth 10 2⁄3 a litre?