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

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

A. 10:14:14

B. 5:7:7

C. 4:7:8

D. 5:8:7

Answer: Option B

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

This question belongs to: Maths Ratio and Proportion

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Question #1 Report Error

Milk and water are in ratio 8:6 in a 248 L mixture. Quantity of milk?

A. 141 L

B. 282 L

C. 175 L

D. 107 L

Correct Answer: Option A

Explanation:
Total parts = 14. Milk = [8 / (8+6)] × 248 = 141 L.

This question belongs to: Maths Ratio and Proportion

Question #2 Report Error

If a:b = 2:4 and b:c = 4:4, then a:b:c = ?

A. 1:4:5

B. 2:5:4

C. 2:4:4

D. 4:8:8

Correct Answer: Option C

Explanation:
Combine ratios: a:b = 2:4, b:c = 4:4 ⇒ a:b:c = 2:4:4.

This question belongs to: Maths Ratio and Proportion

Question #3 Report Error

Two numbers are in the ratio 10:4 and their sum is 482. Find the numbers.

A. 323 and 146

B. 680 and 272

C. 357 and 117

D. 340 and 136

Correct Answer: Option D

Explanation:
Numbers = 10k and 4k. 10k + 4k = 482 ⇒ k = 34. Thus, numbers are 340 and 136.

This question belongs to: Maths Ratio and Proportion