Then, 12/100 = x/60 → x = 7.2 ml Therefore, 7.2 ml is present in 60 ml of water. So in order to get a 8% chlorine solution, we need to add 90-60 = 30 ml of water.
In order for this 7.2 ml to constitute 8% of the solution, we need to add extra water. Question: There is a 20 litres of a solution which has 20% of bleach.
Extra bleach is added to it to make it to 50% bleach solution. So, for each kg of cashews added, let’s consider it as ‘-5’ and for each kg of walnuts added, let’s consider it as ‘ 15’.
How much water has to be added further to bring it back to 20% bleach solution? In the first part, there is 20% of bleach in 20 L of solution → 4 L of bleach in 16 L of water = 20 L of solution. These two have to be added in such a way that they cancel out each other.
If 60kgs of this sweet has to be prepared, how much sugar is required?
Solution: Let the quantity of sugar required be x kgs. Therefore, 20 kgs of sugar is required for 60 kgs of sweet.In the second step we need to divide and simplify to get the value of the unknown variable.This video gives a simple two step method on how to solve ratios and proportions.a, d are called the extremes and b, c are called the means.For a proportion a:b = c:d, product of means = product of extremes → b*c = a*d.Therefore, 45 litres of sugar solution has to be added to bring it to the ratio 2:1.Question: A certain recipe calls for 3kgs of sugar for every 6 kgs of flour.Question: In a certain room, there are 28 women and 21 men. What is the ratio of women to the total number of people?Solution: Men : women = 21 : 28 = 3:4 Women : total number of people = 28 : 49 = 4 : 7 Question: In a group, the ratio of doctors to lawyers is 5:4. For instance, the ratio of number of boys in a class to the number of girls is 2:3.Here, 2 and 3 are not taken as the exact count of the students but a multiple of them, which means the number of boys can be 2 or 4 or 6…etc and the number of girls is 3 or 6 or 9… It also means that in every five students, there are two boys and three girls.