If a:b = 6:7 and b:c = 7:4, then a:b:c = ? MCQ with Answer and Explanation

If a:b = 6:7 and b:c = 7:4, then a:b:c = ?

A. 12:14:8

B. 6:7:4

C. 5:7:5

D. 6:8:4

Answer: Option B

Combine ratios: a:b = 6:7, b:c = 7:4 ⇒ a:b:c = 6:7:4.

This question belongs to: Maths Ratio and Proportion

No comments yet. Be the first to start the discussion!

Question #1 Report Error

Milk and water are in ratio 6:4 in a 289 L mixture. Quantity of milk?

A. 223 L

B. 116 L

C. 173 L

D. 346 L

Correct Answer: Option C

Explanation:
Total parts = 10. Milk = [6 / (6+4)] × 289 = 173 L.

This question belongs to: Maths Ratio and Proportion

Question #2 Report Error

Find the mean proportional between 22 and 16.

A. 18

B. 21

C. 38

D. 36

Correct Answer: Option A

Explanation:
Mean proportional = √(22 × 16) = √(352) = 18.

This question belongs to: Maths Ratio and Proportion

Question #3 Report Error

Two numbers are in the ratio 8:6 and their sum is 434. Find the numbers.

A. 496 and 372

B. 230 and 206

C. 248 and 186

D. 262 and 167

Correct Answer: Option C

Explanation:
Numbers = 8k and 6k. 8k + 6k = 434 ⇒ k = 31. Thus, numbers are 248 and 186.

This question belongs to: Maths Ratio and Proportion