If a:b = 7:5 and b:c = 5:12, then a:b:c = ? MCQ with Answer and Explanation

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If a:b = 7:5 and b:c = 5:12, then a:b:c = ?

A. 7:6:12

B. 7:5:12

C. 14:10:24

D. 6:5:13

Answer: Option B

Solution (By JKSSB Mock Tests)

Combine ratios: a:b = 7:5, b:c = 5:12 ⇒ a:b:c = 7:5:12.

This question belongs to: Maths Ratio and Proportion

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Question #1

If a:b = 3:9 and b:c = 9:7, then a:b:c = ?

A. 6:18:14

B. 3:10:7

C. 3:9:7

D. 2:9:8

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Correct Answer: Option C

Explanation:
Combine ratios: a:b = 3:9, b:c = 9:7 ⇒ a:b:c = 3:9:7.

This question belongs to: Maths Ratio and Proportion

Question #2

If a:b = 3:3 and b:c = 3:12, then a:b:c = ?

A. 3:3:12

B. 6:6:24

C. 2:3:13

D. 3:4:12

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Correct Answer: Option A

Explanation:
Combine ratios: a:b = 3:3, b:c = 3:12 ⇒ a:b:c = 3:3:12.

This question belongs to: Maths Ratio and Proportion

Question #3

Milk and water are in ratio 8:2 in a 260 L mixture. Quantity of milk?

A. 416 L

B. 255 L

C. 208 L

D. 52 L

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Correct Answer: Option C

Explanation:
Total parts = 10. Milk = [8 / (8+2)] × 260 = 208 L.

This question belongs to: Maths Ratio and Proportion

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