Ratio of present ages of A and B is 4:6. After 9 years, the ratio becomes 7:8. Present age of A is? MCQ with Answer and Explanation

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Ratio of present ages of A and B is 4:6. After 9 years, the ratio becomes 7:8. Present age of A is?

A. 93 years

B. 83 years

C. 176 years

D. 88 years

Answer: Option D

Solution (By JKSSB Mock Tests)

Let ages 4k and 6k. Then (4k + 9)/(6k + 9) = 7/8. Solving gives k ≈ 22, age of A = 4*22 = 88.

This question belongs to: Maths Ratio and Proportion

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Practice More Ratio and Proportion Questions

Question #1

Find the mean proportional between 19 and 14.

A. 19

B. 33

C. 32

D. 16

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Correct Answer: Option D

Explanation:
Mean proportional = √(19 × 14) = √(266) = 16.

This question belongs to: Maths Ratio and Proportion

Question #2

Milk and water are in ratio 6:6 in a 413 L mixture. Quantity of milk?

A. 206 L

B. 412 L

C. 245 L

D. 207 L

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Correct Answer: Option A

Explanation:
Total parts = 12. Milk = [6 / (6+6)] × 413 = 206 L.

This question belongs to: Maths Ratio and Proportion

Question #3

Two numbers are in the ratio 12:9 and their sum is 569. Find the numbers.

A. 324 and 243

B. 648 and 486

C. 341 and 215

D. 317 and 258

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Correct Answer: Option A

Explanation:
Numbers = 12k and 9k. 12k + 9k = 569 ⇒ k = 27. Thus, numbers are 324 and 243.

This question belongs to: Maths Ratio and Proportion

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