If a:b = 4:9 and b:c = 9:10, then a:b:c = ? MCQ with Answer and Explanation

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If a:b = 4:9 and b:c = 9:10, then a:b:c = ?

A. 4:10:10

B. 8:18:20

C. 3:9:11

D. 4:9:10

Answer: Option D

Solution (By JKSSB Mock Tests)

Combine ratios: a:b = 4:9, b:c = 9:10 ⇒ a:b:c = 4:9:10.

This question belongs to: Maths Ratio and Proportion

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Question #1

If a:b = 4:5 and b:c = 5:8, then a:b:c = ?

A. 8:10:16

B. 4:6:8

C. 4:5:8

D. 3:5:9

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Correct Answer: Option C

Explanation:
Combine ratios: a:b = 4:5, b:c = 5:8 ⇒ a:b:c = 4:5:8.

This question belongs to: Maths Ratio and Proportion

Question #2

Two numbers are in the ratio 13:5 and their sum is 464. Find the numbers.

A. 341 and 114

B. 325 and 125

C. 314 and 136

D. 650 and 250

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Correct Answer: Option B

Explanation:
Numbers = 13k and 5k. 13k + 5k = 464 ⇒ k = 25. Thus, numbers are 325 and 125.

This question belongs to: Maths Ratio and Proportion

Question #3

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

A. 2:9:5

B. 4:16:10

C. 2:8:5

D. 1:8:6

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Correct Answer: Option C

Explanation:
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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