Ratio of present ages of A and B is 5:4. After 12 years, the ratio becomes 8:5. Present age of A is? MCQ with Answer and Explanation

Ratio of present ages of A and B is 5:4. After 12 years, the ratio becomes 8:5. Present age of A is?

A. 120 years

B. 230 years

C. 111 years

D. 115 years

Answer: Option D

Let ages 5k and 4k. Then (5k + 12)/(4k + 12) = 8/5. Solving gives k ≈ 23, age of A = 5*23 = 115.

This question belongs to: Maths Ratio and Proportion

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Question #1 Report Error

Milk and water are in ratio 8:4 in a 505 L mixture. Quantity of milk?

A. 379 L

B. 336 L

C. 672 L

D. 169 L

Correct Answer: Option B

Explanation:
Total parts = 12. Milk = [8 / (8+4)] × 505 = 336 L.

This question belongs to: Maths Ratio and Proportion

Question #2 Report Error

Two numbers are in ratio 11:7. Their difference is 58. What is their sum?

A. 126

B. 350

C. 280

D. 252

Correct Answer: Option D

Explanation:
Numbers 11k, 7k. Difference |11-7|k = 58 ⇒ k = 14. Sum = (11+7)k ≈ 252.

This question belongs to: Maths Ratio and Proportion

Question #3 Report Error

If a:b = 2:8 and b:c = 8:11, then a:b:c = ?

A. 4:16:22

B. 2:9:11

C. 2:8:11

D. 1:8:12

Correct Answer: Option C

Explanation:
Combine ratios: a:b = 2:8, b:c = 8:11 ⇒ a:b:c = 2:8:11.

This question belongs to: Maths Ratio and Proportion