Ratio of present ages of A and B is 4:6. After 10 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 10 years, the ratio becomes 7:8. Present age of A is?

A. 64 years

B. 26 years

C. 37 years

D. 32 years

Answer: Option D

Solution (By JKSSB Mock Tests)

Let ages 4k and 6k. Then (4k + 10)/(6k + 10) = 7/8. Solving gives k ≈ 8, age of A = 4*8 = 32.

This question belongs to: Maths Ratio and Proportion

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Question #1

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Two numbers are in the ratio 5:14 and their sum is 285. Find the numbers.

A. 96 and 184

B. 150 and 420

C. 75 and 210

D. 58 and 219

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Correct Answer: Option C

Explanation:
Numbers = 5k and 14k. 5k + 14k = 285 ⇒ k = 15. Thus, numbers are 75 and 210.

This question belongs to: Maths Ratio and Proportion

Question #2

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Two numbers are in ratio 9:7. Their difference is 120. What is their sum?

A. 400

B. 200

C. 489

D. 445

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Correct Answer: Option A

Explanation:
Numbers 9k, 7k. Difference |9-7|k = 120 ⇒ k = 60. Sum = (9+7)k ≈ 400.

This question belongs to: Maths Ratio and Proportion

Question #3

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

A. 245 L

B. 207 L

C. 206 L

D. 412 L

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Correct Answer: Option C

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

This question belongs to: Maths Ratio and Proportion

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