Two numbers are in ratio 9:4. Their difference is 40. What is their sum? MCQ with Answer and Explanation

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Two numbers are in ratio 9:4. Their difference is 40. What is their sum?

A. 601

B. 286

C. 714

D. 572

Answer: Option D

Solution (By JKExamLibrary)

Numbers 9k, 4k. Difference |9-4|k = 40 ⇒ k = 8. Sum = (9+4)k ≈ 572.

This question belongs to: Maths Ratio and Proportion

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Practice More Ratio and Proportion Questions

Question #1 Report Error

If a:b = 8:4 and b:c = 4:11, then a:b:c = ?

A. 7:4:12

B. 8:4:11

C. 16:8:22

D. 8:5:11

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Correct Answer: Option B

Explanation:
Combine ratios: a:b = 8:4, b:c = 4:11 ⇒ a:b:c = 8:4:11.

This question belongs to: Maths Ratio and Proportion

Question #2 Report Error

Find the mean proportional between 4 and 32.

A. 22

B. 14

C. 36

D. 11

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Correct Answer: Option D

Explanation:
Mean proportional = √(4 × 32) = √(128) = 11.

This question belongs to: Maths Ratio and Proportion

Question #3 Report Error

If a:b = 8:6 and b:c = 6:10, then a:b:c = ?

A. 7:6:11

B. 8:6:10

C. 16:12:20

D. 8:7:10

View Answer & Solution Discuss

Correct Answer: Option B

Explanation:
Combine ratios: a:b = 8:6, b:c = 6:10 ⇒ a:b:c = 8:6:10.

This question belongs to: Maths Ratio and Proportion

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