Two numbers are in the ratio 14:7 and their sum is 130. Find the numbers. MCQ with Answer and Explanation
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Question #1
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Find the mean proportional between 36 and 21.
Correct Answer: Option B
Explanation:
Mean proportional = √(36 × 21) = √(756) = 27.
Mean proportional = √(36 × 21) = √(756) = 27.
This question belongs to:
Maths
Ratio and Proportion
Question #2
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If a:b = 7:10 and b:c = 10:9, then a:b:c = ?
Correct Answer: Option D
Explanation:
Combine ratios: a:b = 7:10, b:c = 10:9 ⇒ a:b:c = 7:10:9.
Combine ratios: a:b = 7:10, b:c = 10:9 ⇒ a:b:c = 7:10:9.
This question belongs to:
Maths
Ratio and Proportion
Question #3
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Ratio of present ages of A and B is 5:8. After 6 years, the ratio becomes 6:11. Present age of A is?
Correct Answer: Option B
Explanation:
Let ages 5k and 8k. Then (5k + 6)/(8k + 6) = 6/11. Solving gives k ≈ 16, age of A = 5*16 = 80.
Let ages 5k and 8k. Then (5k + 6)/(8k + 6) = 6/11. Solving gives k ≈ 16, age of A = 5*16 = 80.
This question belongs to:
Maths
Ratio and Proportion
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