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

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

A. 5:6:5

B. 10:10:10

C. 5:5:5

D. 4:5:6

Answer: Option C

Solution (By JKExamLibrary)

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

This question belongs to: Maths Ratio and Proportion

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Question #1

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Milk and water are in ratio 5:2 in a 305 L mixture. Quantity of milk?

A. 217 L

B. 434 L

C. 88 L

D. 265 L

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Correct Answer: Option A

Explanation:
Total parts = 7. Milk = [5 / (5+2)] × 305 = 217 L.

This question belongs to: Maths Ratio and Proportion

Question #2

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Ratio of present ages of A and B is 4:7. After 12 years, the ratio becomes 6:9. Present age of A is?

A. 44 years

B. 88 years

C. 49 years

D. 40 years

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Correct Answer: Option A

Explanation:
Let ages 4k and 7k. Then (4k + 12)/(7k + 12) = 6/9. Solving gives k ≈ 11, age of A = 4*11 = 44.

This question belongs to: Maths Ratio and Proportion

Question #3

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If a:b = 4:10 and b:c = 10:10, then a:b:c = ?

A. 3:10:11

B. 8:20:20

C. 4:11:10

D. 4:10:10

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Correct Answer: Option D

Explanation:
Combine ratios: a:b = 4:10, b:c = 10:10 ⇒ a:b:c = 4:10:10.

This question belongs to: Maths Ratio and Proportion

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