Ratio of present ages of A and B is 3:5. After 6 years, the ratio becomes 4:7. Present age of A is? MCQ with Answer and Explanation

Question

Share Report Error

Ratio of present ages of A and B is 3:5. After 6 years, the ratio becomes 4:7. Present age of A is?

A. 126 years

B. 63 years

C. 68 years

D. 58 years

Answer: Option B

Solution (By JKSSB Mock Tests)

Let ages 3k and 5k. Then (3k + 6)/(5k + 6) = 4/7. Solving gives k ≈ 21, age of A = 3*21 = 63.

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

If a:b = 3:10 and b:c = 10:11, then a:b:c = ?

A. 6:20:22

B. 3:10:11

C. 2:10:12

D. 3:11:11

View Answer & Solution Discuss

Get Complete Subject PDF for Maths

Correct Answer: Option B

Explanation:
Combine ratios: a:b = 3:10, b:c = 10:11 ⇒ a:b:c = 3:10:11.

This question belongs to: Maths Ratio and Proportion

Question #2

If a:b = 3:3 and b:c = 3:12, then a:b:c = ?

A. 6:6:24

B. 3:4:12

C. 3:3:12

D. 2:3:13

View Answer & Solution Discuss

Get Complete Subject PDF for Maths

Correct Answer: Option C

Explanation:
Combine ratios: a:b = 3:3, b:c = 3:12 ⇒ a:b:c = 3:3:12.

This question belongs to: Maths Ratio and Proportion

Question #3

Two numbers are in ratio 6:4. Their difference is 60. What is their sum?

A. 497

B. 175

C. 350

D. 381

View Answer & Solution Discuss

Get Complete Subject PDF for Maths

Correct Answer: Option C

Explanation:
Numbers 6k, 4k. Difference |6-4|k = 60 ⇒ k = 30. Sum = (6+4)k ≈ 350.

This question belongs to: Maths Ratio and Proportion

Explore All Ratio and Proportion MCQs