Question

In a mixture of 60 litres the ratio of milk and water is 2 is to 1 if the ratio is to be 1 is to 2 then the quantity of water to be provided is

Answer 1

add the ratios 1+2=3

after that you have to divide the total amount by the sum of ratios(60/3=20)

20x1 =20=milk

20x2=40=water

when we switch both water=20 and milk=40