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. 3:4:10

B. 8:8:18

C. 4:4:9

D. 4:5:9

Answer: Option C

Solution (By JKExamLibrary)

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 Report Error

Find the mean proportional between 22 and 51.

A. 73

B. 33

C. 66

D. 36

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Correct Answer: Option B

Explanation:
Mean proportional = √(22 × 51) = √(1122) = 33.

This question belongs to: Maths Ratio and Proportion

Question #2 Report Error

Two numbers are in the ratio 15:4 and their sum is 182. Find the numbers.

A. 155 and 15

B. 118 and 54

C. 135 and 36

D. 270 and 72

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Correct Answer: Option C

Explanation:
Numbers = 15k and 4k. 15k + 4k = 182 ⇒ k = 9. Thus, numbers are 135 and 36.

This question belongs to: Maths Ratio and Proportion

Question #3 Report Error

Ratio of present ages of A and B is 7:8. After 11 years, the ratio becomes 10:10. Present age of A is?

A. 166 years

B. 161 years

C. 322 years

D. 156 years

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Correct Answer: Option B

Explanation:
Let ages 7k and 8k. Then (7k + 11)/(8k + 11) = 10/10. Solving gives k ≈ 23, age of A = 7*23 = 161.

This question belongs to: Maths Ratio and Proportion

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