If a:b = 4:10 and b:c = 10:12, then a:b:c = ? MCQ with Answer and Explanation

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If a:b = 4:10 and b:c = 10:12, then a:b:c = ?

A. 4:10:12

B. 3:10:13

C. 4:11:12

D. 8:20:24

Answer: Option A

Solution (By JKSSB Mock Tests)

Combine ratios: a:b = 4:10, b:c = 10:12 ⇒ a:b:c = 4:10:12.

This question belongs to: Maths Ratio and Proportion

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Practice More Ratio and Proportion Questions

Question #1

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

A. 4:7:6

B. 3:6:7

C. 4:6:6

D. 8:12:12

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Correct Answer: Option C

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

This question belongs to: Maths Ratio and Proportion

Question #2

Ratio of present ages of A and B is 4:7. After 12 years, the ratio becomes 6:9. Present age of A is?

A. 40 years

B. 88 years

C. 44 years

D. 49 years

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Correct Answer: Option C

Explanation:
Let ages 4k and 7k. Then (4k + 12)/(7k + 12) = 6/9. Solving gives k ≈ 11, age of A = 4*11 = 44.

This question belongs to: Maths Ratio and Proportion

Question #3

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

A. 5:5:4

B. 5:4:4

C. 10:8:8

D. 4:4:5

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Correct Answer: Option B

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

This question belongs to: Maths Ratio and Proportion

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