Ratio of present ages of A and B is 4:5. After 4 years, the ratio becomes 6:7. Present age of A is? MCQ with Answer and Explanation
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Question #1
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Find the mean proportional between 7 and 28.
Correct Answer: Option B
Explanation:
Mean proportional = √(7 × 28) = √(196) = 14.
Mean proportional = √(7 × 28) = √(196) = 14.
This question belongs to:
Maths
Ratio and Proportion
Question #2
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If a:b = 3:7 and b:c = 7:4, then a:b:c = ?
Correct Answer: Option C
Explanation:
Combine ratios: a:b = 3:7, b:c = 7:4 ⇒ a:b:c = 3:7:4.
Combine ratios: a:b = 3:7, b:c = 7:4 ⇒ a:b:c = 3:7:4.
This question belongs to:
Maths
Ratio and Proportion
Question #3
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If a:b = 8:9 and b:c = 9:5, then a:b:c = ?
Correct Answer: Option B
Explanation:
Combine ratios: a:b = 8:9, b:c = 9:5 ⇒ a:b:c = 8:9:5.
Combine ratios: a:b = 8:9, b:c = 9:5 ⇒ a:b:c = 8:9:5.
This question belongs to:
Maths
Ratio and Proportion
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