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Earn 100

In a mixture of 60 litres, the ratio of milk and water is 2:3. How much water must be added to this mixture so that the ratio of milk and water becomes 1:2?

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Important Questions on Ratio, Proportion and Variation

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If three numbers are in the ratio 1:3:5 and half their sum is 9, then the ratio of cubes of the numbers is _____.
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The ratio between two numbers is 7:11 and their LCM is 154. The first number is _____.
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The incomes of P and Q are in the ratio 1:2 and their expenditures are in the ratio 1:3. If each saves 500, then, find the income of P.
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If the ratio of sines of angles of a triangle is 1:1:2, then find the ratio of square of the greatest side to the sum of the squares of the other two sides.
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The students in three batches at Mindworkzz are in the ratio 2:3:5. If 20 students are increased in each batch, the ratio changes to 4:5:7. Find the total number of students in the three batches before the increment.
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The speeds of three bikes are in the ratio 1:2:3. Find the ratio between the times taken by these bikes to travel the same distance.
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If p, q, r, s are proportional, then find the mean proportional between p2+r2 and q2+s2.
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A number z lies between 0 and 1. Which of the following is true?