Ratio of present ages of A and B is 6:7. After 6 years, the ratio becomes 7:8. 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 20 and 62.
Correct Answer: Option A
Explanation:
Mean proportional = √(20 × 62) = √(1240) = 35.
Mean proportional = √(20 × 62) = √(1240) = 35.
This question belongs to:
Maths
Ratio and Proportion
Question #2
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If a:b = 2:8 and b:c = 8:12, then a:b:c = ?
Correct Answer: Option B
Explanation:
Combine ratios: a:b = 2:8, b:c = 8:12 ⇒ a:b:c = 2:8:12.
Combine ratios: a:b = 2:8, b:c = 8:12 ⇒ a:b:c = 2:8:12.
This question belongs to:
Maths
Ratio and Proportion
Question #3
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If a:b = 6:8 and b:c = 8:6, then a:b:c = ?
Correct Answer: Option A
Explanation:
Combine ratios: a:b = 6:8, b:c = 8:6 ⇒ a:b:c = 6:8:6.
Combine ratios: a:b = 6:8, b:c = 8:6 ⇒ a:b:c = 6:8:6.
This question belongs to:
Maths
Ratio and Proportion
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