Ratio of present ages of A and B is 3:4. After 4 years, the ratio becomes 5:6. Present age of A is? MCQ with Answer and Explanation

Ratio of present ages of A and B is 3:4. After 4 years, the ratio becomes 5:6. Present age of A is?

A. 60 years

B. 71 years

C. 66 years

D. 132 years

Answer: Option C

Let ages 3k and 4k. Then (3k + 4)/(4k + 4) = 5/6. Solving gives k ≈ 22, age of A = 3*22 = 66.

This question belongs to: Maths Ratio and Proportion

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Question #1 Report Error

Ratio of present ages of A and B is 7:8. After 12 years, the ratio becomes 8:9. Present age of A is?

A. 77 years

B. 82 years

C. 70 years

D. 154 years

Correct Answer: Option A

Explanation:
Let ages 7k and 8k. Then (7k + 12)/(8k + 12) = 8/9. Solving gives k ≈ 11, age of A = 7*11 = 77.

This question belongs to: Maths Ratio and Proportion

Question #2 Report Error

Two numbers are in the ratio 6:5 and their sum is 517. Find the numbers.

A. 564 and 470

B. 304 and 215

C. 267 and 244

D. 282 and 235

Correct Answer: Option D

Explanation:
Numbers = 6k and 5k. 6k + 5k = 517 ⇒ k = 47. Thus, numbers are 282 and 235.

This question belongs to: Maths Ratio and Proportion

Question #3 Report Error

Ratio of present ages of A and B is 4:8. After 6 years, the ratio becomes 7:11. Present age of A is?

A. 184 years

B. 97 years

C. 92 years

D. 87 years

Correct Answer: Option C

Explanation:
Let ages 4k and 8k. Then (4k + 6)/(8k + 6) = 7/11. Solving gives k ≈ 23, age of A = 4*23 = 92.

This question belongs to: Maths Ratio and Proportion