Book Maths Puzzle Numerical Ability Age Problem

Three vessels contain milk solutions with the concentrations of milk as 0.2,0.4,0.5 respectively.Solutions of five liters from the first, three from the second, two from the third are mixed. What is the ratio of milk and water in the resultent mixture?

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Book Other Question

Three cubes each od edge 5cm are joined to form a cuboid. Find the total surface area of cuboid so formed(in cm2) A sudoku grid contains digits in such a manner that every row, every column, and every 3x3 box accommodates the digits 1 to 9, without repetition. In the following Sudoku grid, find the values at the cells denoted by x and y and determine the value of 6x + 15y.
a) 87
b) 75
c) 99
d) 66