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

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. 110 years

B. 55 years

C. 60 years

D. 50 years

Answer: Option B

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

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Question #1 Report Error

Milk and water are in ratio 9:2 in a 345 L mixture. Quantity of milk?

A. 282 L

B. 564 L

C. 63 L

D. 303 L

Correct Answer: Option A

Explanation:
Total parts = 11. Milk = [9 / (9+2)] × 345 = 282 L.

This question belongs to: Maths Ratio and Proportion

Question #2 Report Error

If a:b = 4:5 and b:c = 5:6, then a:b:c = ?

A. 3:5:7

B. 4:5:6

C. 4:6:6

D. 8:10:12

Correct Answer: Option B

Explanation:
Combine ratios: a:b = 4:5, b:c = 5:6 ⇒ a:b:c = 4:5:6.

This question belongs to: Maths Ratio and Proportion

Question #3 Report Error

Milk and water are in ratio 3:5 in a 587 L mixture. Quantity of milk?

A. 440 L

B. 248 L

C. 220 L

D. 367 L

Correct Answer: Option C

Explanation:
Total parts = 8. Milk = [3 / (3+5)] × 587 = 220 L.

This question belongs to: Maths Ratio and Proportion