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. 4:11:12

C. 8:20:24

D. 4:10:12

Answer: Option D

Solution (By JKSSB Mock Tests)

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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Question #1

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Two numbers are in the ratio 14:7 and their sum is 130. Find the numbers.

A. 168 and 84

B. 84 and 42

C. 110 and 31

D. 70 and 52

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Correct Answer: Option B

Explanation:
Numbers = 14k and 7k. 14k + 7k = 130 ⇒ k = 6. Thus, numbers are 84 and 42.

This question belongs to: Maths Ratio and Proportion

Question #2

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Two numbers are in the ratio 4:5 and their sum is 398. Find the numbers.

A. 352 and 440

B. 157 and 225

C. 176 and 220

D. 190 and 207

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Correct Answer: Option C

Explanation:
Numbers = 4k and 5k. 4k + 5k = 398 ⇒ k = 44. Thus, numbers are 176 and 220.

This question belongs to: Maths Ratio and Proportion

Question #3

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If a:b = 3:7 and b:c = 7:4, then a:b:c = ?

A. 6:14:8

B. 3:8:4

C. 2:7:5

D. 3:7:4

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Correct Answer: Option D

Explanation:
Combine ratios: a:b = 3:7, b:c = 7:4 ⇒ a:b:c = 3:7:4.

This question belongs to: Maths Ratio and Proportion

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