Two numbers are in ratio 9:7. Their difference is 120. What is their sum? MCQ with Answer and Explanation
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Question #1
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Find the mean proportional between 20 and 36.
Correct Answer: Option C
Explanation:
Mean proportional = √(20 × 36) = √(720) = 26.
Mean proportional = √(20 × 36) = √(720) = 26.
This question belongs to:
Maths
Ratio and Proportion
Question #2
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Two numbers are in ratio 9:5. Their difference is 112. What is their sum?
Correct Answer: Option A
Explanation:
Numbers 9k, 5k. Difference |9-5|k = 112 ⇒ k = 28. Sum = (9+5)k ≈ 420.
Numbers 9k, 5k. Difference |9-5|k = 112 ⇒ k = 28. Sum = (9+5)k ≈ 420.
This question belongs to:
Maths
Ratio and Proportion
Question #3
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Two numbers are in the ratio 4:5 and their sum is 398. Find the numbers.
Correct Answer: Option B
Explanation:
Numbers = 4k and 5k. 4k + 5k = 398 ⇒ k = 44. Thus, numbers are 176 and 220.
Numbers = 4k and 5k. 4k + 5k = 398 ⇒ k = 44. Thus, numbers are 176 and 220.
This question belongs to:
Maths
Ratio and Proportion
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