If a:b = 2:8 and b:c = 8:5, then a:b:c = ? MCQ with Answer and Explanation

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If a:b = 2:8 and b:c = 8:5, then a:b:c = ?

A. 4:16:10

B. 1:8:6

C. 2:9:5

D. 2:8:5

Answer: Option D

Solution (By JKSSB Mock Tests)

Combine ratios: a:b = 2:8, b:c = 8:5 ⇒ a:b:c = 2:8:5.

This question belongs to: Maths Ratio and Proportion

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Question #1

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Milk and water are in ratio 3:7 in a 391 L mixture. Quantity of milk?

A. 117 L

B. 153 L

C. 234 L

D. 274 L

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Correct Answer: Option A

Explanation:
Total parts = 10. Milk = [3 / (3+7)] × 391 = 117 L.

This question belongs to: Maths Ratio and Proportion

Question #2

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Two numbers are in the ratio 4:3 and their sum is 631. Find the numbers.

A. 360 and 270

B. 720 and 540

C. 380 and 258

D. 347 and 287

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Correct Answer: Option A

Explanation:
Numbers = 4k and 3k. 4k + 3k = 631 ⇒ k = 90. Thus, numbers are 360 and 270.

This question belongs to: Maths Ratio and Proportion

Question #3

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Two numbers are in ratio 11:6. Their difference is 58. What is their sum?

A. 272

B. 136

C. 310

D. 391

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Correct Answer: Option A

Explanation:
Numbers 11k, 6k. Difference |11-6|k = 58 ⇒ k = 11. Sum = (11+6)k ≈ 272.

This question belongs to: Maths Ratio and Proportion

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