If a:b = 2:6 and b:c = 6:10, then a:b:c = ? MCQ with Answer and Explanation

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If a:b = 2:6 and b:c = 6:10, then a:b:c = ?

A. 2:6:10

B. 4:12:20

C. 2:7:10

D. 1:6:11

Answer: Option A

Solution (By JKSSB Mock Tests)

Combine ratios: a:b = 2:6, b:c = 6:10 ⇒ a:b:c = 2:6:10.

This question belongs to: Maths Ratio and Proportion

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Question #1

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Two numbers are in the ratio 7:15 and their sum is 454. Find the numbers.

A. 140 and 300

B. 126 and 320

C. 170 and 281

D. 280 and 600

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Correct Answer: Option A

Explanation:
Numbers = 7k and 15k. 7k + 15k = 454 ⇒ k = 20. Thus, numbers are 140 and 300.

This question belongs to: Maths Ratio and Proportion

Question #2

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If a:b = 2:7 and b:c = 7:6, then a:b:c = ?

A. 4:14:12

B. 2:8:6

C. 2:7:6

D. 1:7:7

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Correct Answer: Option C

Explanation:
Combine ratios: a:b = 2:7, b:c = 7:6 ⇒ a:b:c = 2:7:6.

This question belongs to: Maths Ratio and Proportion

Question #3

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Two numbers are in ratio 9:7. Their difference is 150. What is their sum?

A. 423

B. 288

C. 326

D. 144

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Correct Answer: Option B

Explanation:
Numbers 9k, 7k. Difference |9-7|k = 150 ⇒ k = 75. Sum = (9+7)k ≈ 288.

This question belongs to: Maths Ratio and Proportion

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