Knowee
Questions
Features
Study Tools

Select the correct answerThe ratio of the present ages of two boys is 3 : 4. After 3 years, the ratio of their ages is equal to will be 4 : 5.The ratio of their ages after 21 years will be?Options17 : 1914 : 1711 : 1210 : 11

Question

Select the correct answerThe ratio of the present ages of two boys is 3 : 4. After 3 years, the ratio of their ages is equal to will be 4 : 5.The ratio of their ages after 21 years will be?Options17 : 1914 : 1711 : 1210 : 11

🧐 Not the exact question you are looking for?Go ask a question

Solution

Let's solve this step by step:

  1. Let's assume the present ages of the two boys are 3x and 4x.

  2. According to the problem, after 3 years, the ratio of their ages will be 4:5. So we can set up the equation as follows: (3x + 3) / (4x + 3) = 4/5

  3. Solving this equation, we get x = 3. So, the present ages of the boys are 9 and 12.

  4. The problem asks for the ratio of their ages after 21 years. So, after 21 years, their ages will be 30 and 33.

  5. Therefore, the ratio of their ages after 21 years will be 30:33, which simplifies to 10:11.

So, the correct answer is 10:11.

This problem has been solved

Similar Questions

Select the correct answerTen years before, the ages of a mother and her daughter were in the ratio 3 : 1. In another 10 yr. from now, the ratio of their ages will be 13 : 7. What are their present ages?Options75 yr, 25 yr49 yr, 31 yr39 yr, 21 yr55 yr, 25 yr

The ratio of a father’s age to his son’s age is 4 : 1. The product of their ages is 196. What will be the ratio of their ages after 5 years?3 : 24 : 1111 : 44:1

Ratio of the present age of a father to that of the son is 7 : 1. After 5 years the ratio will become 4: 1. What is the difference (in years) in their present ages? Options : 10 20 30 40

Select the correct answerThe ratio of the ages of Ram and Rahim 10 years ago was 1 : 3. The ratio of their ages 5 Years hence will be 2 : 3. Then, the ratio of their present ages is?Options1 : 23 : 42 : 53 : 5

Select the correct answerSeven years ago, the ages (in years) of A and B were in the ratio 4 : 5 and 7 years hence, their ages will be in the ratio 5 : 6. What will be ratio of their ages 5 years from now?Options31 : 3333 : 3434 : 4133 : 40

1/3

Upgrade your grade with Knowee

Get personalized homework help. Review tough concepts in more detail, or go deeper into your topic by exploring other relevant questions.