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Ratio and Proportion

Ratio, proportion and unitary method.

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Q1 · Ratio and Proportion · EASY
The ratio of boys to girls in a class is 3:2. If there are 15 boys in the class, how many girls are there?
Q2 · Ratio and Proportion · EASY
A sum of Rs. 3600 is to be divided among A, B and C in the ratio 2:3:4. How much does B receive?
Q3 · Ratio and Proportion · MEDIUM
If 15 workers can complete a work in 12 days, how many days will 20 workers take to complete the same work, assuming all workers work at the same rate?
Q4 · Ratio and Proportion · HARD
The ratio of the ages of Ram and Shyam is 5:7. After 6 years, the ratio of their ages will become 3:4. What is Ram's present age?
Q5 · Ratio and Proportion · EASY
The ratio of the ages of two brothers is 5:7. If the younger brother is 15 years old, what is the age of the elder brother?