If a:b = 4:5 and b:c = 5:5, then a:b:c = ? MCQ with Answer and Explanation

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If a:b = 4:5 and b:c = 5:5, then a:b:c = ?

A. 8:10:10

B. 4:5:5

C. 3:5:6

D. 4:6:5

Answer: Option B

Solution (By JKSSB Mock Tests)

Combine ratios: a:b = 4:5, b:c = 5:5 ⇒ a:b:c = 4:5:5.

This question belongs to: Maths Ratio and Proportion

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Question #1

If a:b = 5:9 and b:c = 9:11, then a:b:c = ?

A. 5:10:11

B. 4:9:12

C. 10:18:22

D. 5:9:11

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Correct Answer: Option D

Explanation:
Combine ratios: a:b = 5:9, b:c = 9:11 ⇒ a:b:c = 5:9:11.

This question belongs to: Maths Ratio and Proportion

Question #2

Two numbers are in ratio 4:9. Their difference is 73. What is their sum?

A. 260

B. 520

C. 656

D. 557

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Correct Answer: Option B

Explanation:
Numbers 4k, 9k. Difference |4-9|k = 73 ⇒ k = 14. Sum = (4+9)k ≈ 520.

This question belongs to: Maths Ratio and Proportion

Question #3

Two numbers are in ratio 10:6. Their difference is 122. What is their sum?

A. 272

B. 630

C. 582

D. 544

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Correct Answer: Option D

Explanation:
Numbers 10k, 6k. Difference |10-6|k = 122 ⇒ k = 30. Sum = (10+6)k ≈ 544.

This question belongs to: Maths Ratio and Proportion

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