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

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

A. 8:8:18

B. 3:4:10

C. 4:4:9

D. 4:5:9

Answer: Option C

Solution (By JKSSB Mock Tests)

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

This question belongs to: Maths Ratio and Proportion

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Practice More Ratio and Proportion Questions

Question #1

If a:b = 8:3 and b:c = 3:6, then a:b:c = ?

A. 16:6:12

B. 7:3:7

C. 8:4:6

D. 8:3:6

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Correct Answer: Option D

Explanation:
Combine ratios: a:b = 8:3, b:c = 3:6 ⇒ a:b:c = 8:3:6.

This question belongs to: Maths Ratio and Proportion

Question #2

Ratio of present ages of A and B is 3:5. After 6 years, the ratio becomes 4:7. Present age of A is?

A. 58 years

B. 63 years

C. 68 years

D. 126 years

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Correct Answer: Option B

Explanation:
Let ages 3k and 5k. Then (3k + 6)/(5k + 6) = 4/7. Solving gives k ≈ 21, age of A = 3*21 = 63.

This question belongs to: Maths Ratio and Proportion

Question #3

If a:b = 4:7 and b:c = 7:10, then a:b:c = ?

A. 4:8:10

B. 4:7:10

C. 3:7:11

D. 8:14:20

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Correct Answer: Option B

Explanation:
Combine ratios: a:b = 4:7, b:c = 7:10 ⇒ a:b:c = 4:7:10.

This question belongs to: Maths Ratio and Proportion

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