If a:b = 2:9 and b:c = 9:7, then a:b:c = ? MCQ with Answer and Explanation

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If a:b = 2:9 and b:c = 9:7, then a:b:c = ?

A. 1:9:8

B. 4:18:14

C. 2:10:7

D. 2:9:7

Answer: Option D

Solution (By JKSSB Mock Tests)

Combine ratios: a:b = 2:9, b:c = 9:7 ⇒ a:b:c = 2:9:7.

This question belongs to: Maths Ratio and Proportion

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Question #1

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Two numbers are in the ratio 5:3 and their sum is 590. Find the numbers.

A. 348 and 236

B. 730 and 438

C. 389 and 195

D. 365 and 219

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Correct Answer: Option D

Explanation:
Numbers = 5k and 3k. 5k + 3k = 590 ⇒ k = 73. Thus, numbers are 365 and 219.

This question belongs to: Maths Ratio and Proportion

Question #2

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Milk and water are in ratio 9:7 in a 533 L mixture. Quantity of milk?

A. 234 L

B. 598 L

C. 299 L

D. 336 L

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Correct Answer: Option C

Explanation:
Total parts = 16. Milk = [9 / (9+7)] × 533 = 299 L.

This question belongs to: Maths Ratio and Proportion

Question #3

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Two numbers are in the ratio 4:8 and their sum is 512. Find the numbers.

A. 162 and 351

B. 178 and 309

C. 168 and 336

D. 336 and 672

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Correct Answer: Option C

Explanation:
Numbers = 4k and 8k. 4k + 8k = 512 ⇒ k = 42. Thus, numbers are 168 and 336.

This question belongs to: Maths Ratio and Proportion

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