Ratio of present ages of A and B is 7:8. After 8 years, the ratio becomes 9:9. Present age of A is? MCQ with Answer and Explanation

Ratio of present ages of A and B is 7:8. After 8 years, the ratio becomes 9:9. Present age of A is?

A. 140 years

B. 280 years

C. 145 years

D. 135 years

Answer: Option A

Let ages 7k and 8k. Then (7k + 8)/(8k + 8) = 9/9. Solving gives k ≈ 20, age of A = 7*20 = 140.

This question belongs to: Maths Ratio and Proportion

No comments yet. Be the first to start the discussion!

Question #1 Report Error

Milk and water are in ratio 8:3 in a 249 L mixture. Quantity of milk?

A. 362 L

B. 210 L

C. 68 L

D. 181 L

Correct Answer: Option D

Explanation:
Total parts = 11. Milk = [8 / (8+3)] × 249 = 181 L.

This question belongs to: Maths Ratio and Proportion

Question #2 Report Error

If a:b = 3:10 and b:c = 10:4, then a:b:c = ?

A. 3:10:4

B. 3:11:4

C. 6:20:8

D. 2:10:5

Correct Answer: Option A

Explanation:
Combine ratios: a:b = 3:10, b:c = 10:4 ⇒ a:b:c = 3:10:4.

This question belongs to: Maths Ratio and Proportion

Question #3 Report Error

Milk and water are in ratio 9:3 in a 408 L mixture. Quantity of milk?

A. 102 L

B. 306 L

C. 349 L

D. 612 L

Correct Answer: Option B

Explanation:
Total parts = 12. Milk = [9 / (9+3)] × 408 = 306 L.

This question belongs to: Maths Ratio and Proportion