If a:b = 4:7 and b:c = 7:8, then a:b:c = ? MCQ with Answer and Explanation
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Question #1
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If a:b = 7:3 and b:c = 3:8, then a:b:c = ?
Correct Answer: Option A
Explanation:
Combine ratios: a:b = 7:3, b:c = 3:8 ⇒ a:b:c = 7:3:8.
Combine ratios: a:b = 7:3, b:c = 3:8 ⇒ a:b:c = 7:3:8.
This question belongs to:
Maths
Ratio and Proportion
Question #2
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Two numbers are in ratio 7:12. Their difference is 57. What is their sum?
Correct Answer: Option B
Explanation:
Numbers 7k, 12k. Difference |7-12|k = 57 ⇒ k = 11. Sum = (7+12)k ≈ 228.
Numbers 7k, 12k. Difference |7-12|k = 57 ⇒ k = 11. Sum = (7+12)k ≈ 228.
This question belongs to:
Maths
Ratio and Proportion
Question #3
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Find the mean proportional between 22 and 51.
Correct Answer: Option D
Explanation:
Mean proportional = √(22 × 51) = √(1122) = 33.
Mean proportional = √(22 × 51) = √(1122) = 33.
This question belongs to:
Maths
Ratio and Proportion
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