If a:b = 8:5 and b:c = 5:4, then a:b:c = ? MCQ with Answer and Explanation

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

A. 8:6:4

B. 7:5:5

C. 8:5:4

D. 16:10:8

Answer: Option C

Solution (By JKSSB Mock Tests)

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

This question belongs to: Maths Ratio and Proportion

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Question #1

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

A. 3:6:7

B. 4:7:6

C. 8:12:12

D. 4:6:6

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Correct Answer: Option D

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

If a:b = 5:7 and b:c = 7:7, then a:b:c = ?

A. 10:14:14

B. 4:7:8

C. 5:8:7

D. 5:7:7

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Correct Answer: Option D

Explanation:
Combine ratios: a:b = 5:7, b:c = 7:7 ⇒ a:b:c = 5:7:7.

This question belongs to: Maths Ratio and Proportion

Question #3

Two numbers are in the ratio 11:9 and their sum is 682. Find the numbers.

A. 374 and 306

B. 367 and 312

C. 748 and 612

D. 399 and 285

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Correct Answer: Option A

Explanation:
Numbers = 11k and 9k. 11k + 9k = 682 ⇒ k = 34. Thus, numbers are 374 and 306.

This question belongs to: Maths Ratio and Proportion

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