If a:b = 8:6 and b:c = 6:11, then a:b:c = ? MCQ with Answer and Explanation

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If a:b = 8:6 and b:c = 6:11, then a:b:c = ?

A. 7:6:12

B. 8:7:11

C. 8:6:11

D. 16:12:22

Answer: Option C

Solution (By JKSSB Mock Tests)

Combine ratios: a:b = 8:6, b:c = 6:11 ⇒ a:b:c = 8:6:11.

This question belongs to: Maths Ratio and Proportion

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Question #1

If a:b = 4:3 and b:c = 3:12, then a:b:c = ?

A. 4:4:12

B. 3:3:13

C. 8:6:24

D. 4:3:12

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Correct Answer: Option D

Explanation:
Combine ratios: a:b = 4:3, b:c = 3:12 ⇒ a:b:c = 4:3:12.

This question belongs to: Maths Ratio and Proportion

Question #2

If a:b = 2:3 and b:c = 3:5, then a:b:c = ?

A. 1:3:6

B. 2:4:5

C. 4:6:10

D. 2:3:5

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Correct Answer: Option D

Explanation:
Combine ratios: a:b = 2:3, b:c = 3:5 ⇒ a:b:c = 2:3:5.

This question belongs to: Maths Ratio and Proportion

Question #3

Ratio of present ages of A and B is 3:4. After 4 years, the ratio becomes 5:6. Present age of A is?

A. 132 years

B. 60 years

C. 71 years

D. 66 years

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Correct Answer: Option D

Explanation:
Let ages 3k and 4k. Then (3k + 4)/(4k + 4) = 5/6. Solving gives k ≈ 22, age of A = 3*22 = 66.

This question belongs to: Maths Ratio and Proportion

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