If a:b = 6:10 and b:c = 10:8, then a:b:c = ? MCQ with Answer and Explanation

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If a:b = 6:10 and b:c = 10:8, then a:b:c = ?

A. 6:11:8

B. 5:10:9

C. 12:20:16

D. 6:10:8

Answer: Option D

Solution (By JKSSB Mock Tests)

Combine ratios: a:b = 6:10, b:c = 10:8 ⇒ a:b:c = 6:10:8.

This question belongs to: Maths Ratio and Proportion

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Practice More Ratio and Proportion Questions

Question #1

Milk and water are in ratio 6:2 in a 401 L mixture. Quantity of milk?

A. 101 L

B. 300 L

C. 600 L

D. 345 L

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Correct Answer: Option B

Explanation:
Total parts = 8. Milk = [6 / (6+2)] × 401 = 300 L.

This question belongs to: Maths Ratio and Proportion

Question #2

Milk and water are in ratio 3:5 in a 587 L mixture. Quantity of milk?

A. 440 L

B. 248 L

C. 220 L

D. 367 L

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Correct Answer: Option C

Explanation:
Total parts = 8. Milk = [3 / (3+5)] × 587 = 220 L.

This question belongs to: Maths Ratio and Proportion

Question #3

Ratio of present ages of A and B is 4:5. After 5 years, the ratio becomes 5:8. Present age of A is?

A. 152 years

B. 76 years

C. 81 years

D. 68 years

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Correct Answer: Option B

Explanation:
Let ages 4k and 5k. Then (4k + 5)/(5k + 5) = 5/8. Solving gives k ≈ 19, age of A = 4*19 = 76.

This question belongs to: Maths Ratio and Proportion

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