If a:b = 2:8 and b:c = 8:8, then a:b:c = ? MCQ with Answer and Explanation

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If a:b = 2:8 and b:c = 8:8, then a:b:c = ?

A. 2:8:8

B. 2:9:8

C. 4:16:16

D. 1:8:9

Answer: Option A

Solution (By JKSSB Mock Tests)

Combine ratios: a:b = 2:8, b:c = 8:8 ⇒ a:b:c = 2:8:8.

This question belongs to: Maths Ratio and Proportion

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Question #1

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Milk and water are in ratio 3:4 in a 437 L mixture. Quantity of milk?

A. 187 L

B. 374 L

C. 211 L

D. 250 L

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Correct Answer: Option A

Explanation:
Total parts = 7. Milk = [3 / (3+4)] × 437 = 187 L.

This question belongs to: Maths Ratio and Proportion

Question #2

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Ratio of present ages of A and B is 7:4. After 9 years, the ratio becomes 10:5. Present age of A is?

A. 161 years

B. 168 years

C. 173 years

D. 336 years

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Correct Answer: Option B

Explanation:
Let ages 7k and 4k. Then (7k + 9)/(4k + 9) = 10/5. Solving gives k ≈ 24, age of A = 7*24 = 168.

This question belongs to: Maths Ratio and Proportion

Question #3

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If a:b = 8:9 and b:c = 9:8, then a:b:c = ?

A. 8:10:8

B. 8:9:8

C. 7:9:9

D. 16:18:16

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Correct Answer: Option B

Explanation:
Combine ratios: a:b = 8:9, b:c = 9:8 ⇒ a:b:c = 8:9:8.

This question belongs to: Maths Ratio and Proportion

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