Ratio of present ages of A and B is 5:8. After 6 years, the ratio becomes 6:11. Present age of A is? MCQ with Answer and Explanation

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Ratio of present ages of A and B is 5:8. After 6 years, the ratio becomes 6:11. Present age of A is?

A. 160 years

B. 74 years

C. 80 years

D. 85 years

Answer: Option C

Solution (By JKSSB Mock Tests)

Let ages 5k and 8k. Then (5k + 6)/(8k + 6) = 6/11. Solving gives k ≈ 16, age of A = 5*16 = 80.

This question belongs to: Maths Ratio and Proportion

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Question #1

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Two numbers are in the ratio 7:8 and their sum is 572. Find the numbers.

A. 296 and 283

B. 532 and 608

C. 266 and 304

D. 246 and 324

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Correct Answer: Option C

Explanation:
Numbers = 7k and 8k. 7k + 8k = 572 ⇒ k = 38. Thus, numbers are 266 and 304.

This question belongs to: Maths Ratio and Proportion

Question #2

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Find the mean proportional between 26 and 77.

A. 47

B. 44

C. 103

D. 88

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Correct Answer: Option B

Explanation:
Mean proportional = √(26 × 77) = √(2002) = 44.

This question belongs to: Maths Ratio and Proportion

Question #3

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Two numbers are in the ratio 10:4 and their sum is 482. Find the numbers.

A. 323 and 146

B. 680 and 272

C. 340 and 136

D. 357 and 117

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Correct Answer: Option C

Explanation:
Numbers = 10k and 4k. 10k + 4k = 482 ⇒ k = 34. Thus, numbers are 340 and 136.

This question belongs to: Maths Ratio and Proportion

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