If a:b = 5:8 and b:c = 8:12, then a:b:c = ? MCQ with Answer and Explanation

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If a:b = 5:8 and b:c = 8:12, then a:b:c = ?

A. 4:8:13

B. 5:9:12

C. 5:8:12

D. 10:16:24

Answer: Option C

Solution (By JKSSB Mock Tests)

Combine ratios: a:b = 5:8, b:c = 8:12 ⇒ a:b:c = 5:8:12.

This question belongs to: Maths Ratio and Proportion

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Question #1

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Two numbers are in ratio 8:5. Their difference is 125. What is their sum?

A. 403

B. 445

C. 519

D. 201

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Correct Answer: Option A

Explanation:
Numbers 8k, 5k. Difference |8-5|k = 125 ⇒ k = 41. Sum = (8+5)k ≈ 403.

This question belongs to: Maths Ratio and Proportion

Question #2

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Milk and water are in ratio 4:2 in a 445 L mixture. Quantity of milk?

A. 296 L

B. 149 L

C. 346 L

D. 592 L

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Correct Answer: Option A

Explanation:
Total parts = 6. Milk = [4 / (4+2)] × 445 = 296 L.

This question belongs to: Maths Ratio and Proportion

Question #3

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Milk and water are in ratio 8:6 in a 373 L mixture. Quantity of milk?

A. 213 L

B. 426 L

C. 253 L

D. 160 L

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Correct Answer: Option A

Explanation:
Total parts = 14. Milk = [8 / (8+6)] × 373 = 213 L.

This question belongs to: Maths Ratio and Proportion

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