If a:b = 4:10 and b:c = 10:12, then a:b:c = ? MCQ with Answer and Explanation

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If a:b = 4:10 and b:c = 10:12, then a:b:c = ?

A. 3:10:13

B. 8:20:24

C. 4:11:12

D. 4:10:12

Answer: Option D

Solution (By JKExamLibrary)

Combine ratios: a:b = 4:10, b:c = 10:12 ⇒ a:b:c = 4:10:12.

This question belongs to: Maths Ratio and Proportion

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Practice More Ratio and Proportion Questions

Question #1

Two numbers are in the ratio 7:8 and their sum is 322. Find the numbers.

A. 147 and 168

B. 163 and 154

C. 294 and 336

D. 142 and 188

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Correct Answer: Option A

Explanation:
Numbers = 7k and 8k. 7k + 8k = 322 ⇒ k = 21. Thus, numbers are 147 and 168.

This question belongs to: Maths Ratio and Proportion

Question #2

Milk and water are in ratio 4:5 in a 371 L mixture. Quantity of milk?

A. 164 L

B. 214 L

C. 328 L

D. 207 L

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Correct Answer: Option A

Explanation:
Total parts = 9. Milk = [4 / (4+5)] × 371 = 164 L.

This question belongs to: Maths Ratio and Proportion

Question #3

Two numbers are in ratio 7:4. Their difference is 73. What is their sum?

A. 734

B. 297

C. 636

D. 594

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Correct Answer: Option D

Explanation:
Numbers 7k, 4k. Difference |7-4|k = 73 ⇒ k = 24. Sum = (7+4)k ≈ 594.

This question belongs to: Maths Ratio and Proportion

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