If a:b = 7:7 and b:c = 7:6, then a:b:c = ? MCQ with Answer and Explanation

If a:b = 7:7 and b:c = 7:6, then a:b:c = ?

A. 14:14:12

B. 6:7:7

C. 7:8:6

D. 7:7:6

Answer: Option D

Combine ratios: a:b = 7:7, b:c = 7:6 ⇒ a:b:c = 7:7:6.

This question belongs to: Maths Ratio and Proportion

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Question #1 Report Error

Ratio of present ages of A and B is 3:4. After 4 years, the ratio becomes 5:6. Present age of A is?

A. 132 years

B. 71 years

C. 66 years

D. 60 years

Correct Answer: Option C

Explanation:
Let ages 3k and 4k. Then (3k + 4)/(4k + 4) = 5/6. Solving gives k ≈ 22, age of A = 3*22 = 66.

This question belongs to: Maths Ratio and Proportion

Question #2 Report Error

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

A. 345 L

B. 101 L

C. 600 L

D. 300 L

Correct Answer: Option D

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

This question belongs to: Maths Ratio and Proportion

Question #3 Report Error

Milk and water are in ratio 5:6 in a 503 L mixture. Quantity of milk?

A. 228 L

B. 275 L

C. 456 L

D. 272 L

Correct Answer: Option A

Explanation:
Total parts = 11. Milk = [5 / (5+6)] × 503 = 228 L.

This question belongs to: Maths Ratio and Proportion