How much water must be added to 48 litres of milk at 1 1⁄2 litres for 20 so as to have a mixture worth 10 2⁄3 a litre? Choose the correct choice from the following choices: A) 10 litres B) 12 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 48 litres of milk   = (1⁄4 × 48) litres = 12 litres.   Answer 12 litres
<result>B</result>
How much water must be added to 48 litres of milk at 1 1⁄2 litres for 20 so as to have a mixture worth 10 2⁄3 a litre?