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

Question

Share Report Error

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. 145 years

C. 135 years

D. 280 years

Answer: Option A

Solution (By JKSSB Mock Tests)

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

Request complete Subject PDF

Discuss this Question (0)

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

Practice More Ratio and Proportion Questions

Question #1

Share Report

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

A. 280

B. 350

C. 126

D. 252

View Answer & Solution Discuss

Get Complete Subject PDF for Maths

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 #2

Share Report

Two numbers are in ratio 7:10. Their difference is 99. What is their sum?

A. 482

B. 546

C. 229

D. 459

View Answer & Solution Discuss

Get Complete Subject PDF for Maths

Correct Answer: Option D

Explanation:
Numbers 7k, 10k. Difference |7-10|k = 99 ⇒ k = 33. Sum = (7+10)k ≈ 459.

This question belongs to: Maths Ratio and Proportion

Question #3

Share Report

If a:b = 3:6 and b:c = 6:9, then a:b:c = ?

A. 2:6:10

B. 3:6:9

C. 6:12:18

D. 3:7:9

View Answer & Solution Discuss

Get Complete Subject PDF for Maths

Correct Answer: Option B

Explanation:
Combine ratios: a:b = 3:6, b:c = 6:9 ⇒ a:b:c = 3:6:9.

This question belongs to: Maths Ratio and Proportion

Explore All Ratio and Proportion MCQs