Ratio of present ages of A and B is 6:6. After 12 years, the ratio becomes 8:7. Present age of A is? MCQ with Answer and Explanation

Ratio of present ages of A and B is 6:6. After 12 years, the ratio becomes 8:7. Present age of A is?

A. 64 years

B. 77 years

C. 72 years

D. 144 years

Answer: Option C

Let ages 6k and 6k. Then (6k + 12)/(6k + 12) = 8/7. Solving gives k ≈ 12, age of A = 6*12 = 72.

This question belongs to: Maths Ratio and Proportion

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Question #1 Report Error

Two numbers are in the ratio 15:12 and their sum is 319. Find the numbers.

A. 184 and 102

B. 147 and 149

C. 165 and 132

D. 330 and 264

Correct Answer: Option C

Explanation:
Numbers = 15k and 12k. 15k + 12k = 319 ⇒ k = 11. Thus, numbers are 165 and 132.

This question belongs to: Maths Ratio and Proportion

Question #2 Report Error

Ratio of present ages of A and B is 5:8. After 12 years, the ratio becomes 6:11. Present age of A is?

A. 50 years

B. 60 years

C. 110 years

D. 55 years

Correct Answer: Option D

Explanation:
Let ages 5k and 8k. Then (5k + 12)/(8k + 12) = 6/11. Solving gives k ≈ 11, age of A = 5*11 = 55.

This question belongs to: Maths Ratio and Proportion

Question #3 Report Error

Milk and water are in ratio 5:7 in a 476 L mixture. Quantity of milk?

A. 230 L

B. 198 L

C. 278 L

D. 396 L

Correct Answer: Option B

Explanation:
Total parts = 12. Milk = [5 / (5+7)] × 476 = 198 L.

This question belongs to: Maths Ratio and Proportion