Ratio of present ages of A and B is 7:4. After 7 years, the ratio becomes 10:5. Present age of A is? MCQ with Answer and Explanation

Question

Share Report Error

Ratio of present ages of A and B is 7:4. After 7 years, the ratio becomes 10:5. Present age of A is?

A. 84 years

B. 168 years

C. 78 years

D. 89 years

Answer: Option A

Solution (By JKSSB Mock Tests)

Let ages 7k and 4k. Then (7k + 7)/(4k + 7) = 10/5. Solving gives k ≈ 12, age of A = 7*12 = 84.

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 = 5:9 and b:c = 9:7, then a:b:c = ?

A. 10:18:14

B. 4:9:8

C. 5:10:7

D. 5:9:7

View Answer & Solution Discuss

Get Complete Subject PDF for Maths

Correct Answer: Option D

Explanation:
Combine ratios: a:b = 5:9, b:c = 9:7 ⇒ a:b:c = 5:9:7.

This question belongs to: Maths Ratio and Proportion

Question #2

Two numbers are in the ratio 12:6 and their sum is 224. Find the numbers.

A. 132 and 88

B. 288 and 144

C. 156 and 45

D. 144 and 72

View Answer & Solution Discuss

Get Complete Subject PDF for Maths

Correct Answer: Option D

Explanation:
Numbers = 12k and 6k. 12k + 6k = 224 ⇒ k = 12. Thus, numbers are 144 and 72.

This question belongs to: Maths Ratio and Proportion

Question #3

If a:b = 3:6 and b:c = 6:4, then a:b:c = ?

A. 3:6:4

B. 6:12:8

C. 2:6:5

D. 3:7:4

View Answer & Solution Discuss

Get Complete Subject PDF for Maths

Correct Answer: Option A

Explanation:
Combine ratios: a:b = 3:6, b:c = 6:4 ⇒ a:b:c = 3:6:4.

This question belongs to: Maths Ratio and Proportion

Explore All Ratio and Proportion MCQs