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 = 2:7 and b:c = 7:6, then a:b:c = ?

A. 2:8:6

B. 4:14:12

C. 1:7:7

D. 2:7:6

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Correct Answer: Option D

Explanation:
Combine ratios: a:b = 2:7, b:c = 7:6 ⇒ a:b:c = 2:7:6.

This question belongs to: Maths Ratio and Proportion

Question #2

Two numbers are in the ratio 10:13 and their sum is 790. Find the numbers.

A. 680 and 884

B. 332 and 454

C. 340 and 442

D. 353 and 416

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Correct Answer: Option C

Explanation:
Numbers = 10k and 13k. 10k + 13k = 790 ⇒ k = 34. Thus, numbers are 340 and 442.

This question belongs to: Maths Ratio and Proportion

Question #3

If a:b = 5:8 and b:c = 8:6, then a:b:c = ?

A. 5:8:6

B. 5:9:6

C. 10:16:12

D. 4:8:7

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Correct Answer: Option A

Explanation:
Combine ratios: a:b = 5:8, b:c = 8:6 ⇒ a:b:c = 5:8:6.

This question belongs to: Maths Ratio and Proportion

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