If a:b = 2:8 and b:c = 8:5, then a:b:c = ? MCQ with Answer and Explanation

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If a:b = 2:8 and b:c = 8:5, then a:b:c = ?

A. 4:16:10

B. 2:9:5

C. 2:8:5

D. 1:8:6

Answer: Option C

Solution (By JKSSB Mock Tests)

Combine ratios: a:b = 2:8, b:c = 8:5 ⇒ a:b:c = 2:8:5.

This question belongs to: Maths Ratio and Proportion

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Question #1

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

A. 16:16:20

B. 8:8:10

C. 7:8:11

D. 8:9:10

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Correct Answer: Option B

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

This question belongs to: Maths Ratio and Proportion

Question #2

Two numbers are in ratio 7:12. Their difference is 133. What is their sum?

A. 434

B. 507

C. 199

D. 399

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Correct Answer: Option D

Explanation:
Numbers 7k, 12k. Difference |7-12|k = 133 ⇒ k = 26. Sum = (7+12)k ≈ 399.

This question belongs to: Maths Ratio and Proportion

Question #3

If a:b = 8:5 and b:c = 5:9, then a:b:c = ?

A. 7:5:10

B. 8:6:9

C. 16:10:18

D. 8:5:9

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Correct Answer: Option D

Explanation:
Combine ratios: a:b = 8:5, b:c = 5:9 ⇒ a:b:c = 8:5:9.

This question belongs to: Maths Ratio and Proportion

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