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

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

A. 2:9:8

B. 4:16:16

C. 2:8:8

D. 1:8:9

Answer: Option C

Solution (By JKSSB Mock Tests)

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

This question belongs to: Maths Ratio and Proportion

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Practice More Ratio and Proportion Questions

Question #1

If a:b = 2:6 and b:c = 6:11, then a:b:c = ?

A. 4:12:22

B. 2:6:11

C. 1:6:12

D. 2:7:11

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Correct Answer: Option B

Explanation:
Combine ratios: a:b = 2:6, b:c = 6:11 ⇒ a:b:c = 2:6:11.

This question belongs to: Maths Ratio and Proportion

Question #2

Find the mean proportional between 20 and 36.

A. 52

B. 29

C. 56

D. 26

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Correct Answer: Option D

Explanation:
Mean proportional = √(20 × 36) = √(720) = 26.

This question belongs to: Maths Ratio and Proportion

Question #3

Ratio of present ages of A and B is 7:7. After 10 years, the ratio becomes 10:8. Present age of A is?

A. 159 years

B. 150 years

C. 308 years

D. 154 years

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Correct Answer: Option D

Explanation:
Let ages 7k and 7k. Then (7k + 10)/(7k + 10) = 10/8. Solving gives k ≈ 22, age of A = 7*22 = 154.

This question belongs to: Maths Ratio and Proportion

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