Milk and water are in ratio 9:4 in a 207 L mixture. Quantity of milk? MCQ with Answer and Explanation
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Question #1
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Ratio of present ages of A and B is 7:7. After 10 years, the ratio becomes 10:8. Present age of A is?
Correct Answer: Option B
Explanation:
Let ages 7k and 7k. Then (7k + 10)/(7k + 10) = 10/8. Solving gives k ≈ 22, age of A = 7*22 = 154.
Let ages 7k and 7k. Then (7k + 10)/(7k + 10) = 10/8. Solving gives k ≈ 22, age of A = 7*22 = 154.
This question belongs to:
Maths
Ratio and Proportion
Question #2
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Find the mean proportional between 28 and 14.
Correct Answer: Option A
Explanation:
Mean proportional = √(28 × 14) = √(392) = 19.
Mean proportional = √(28 × 14) = √(392) = 19.
This question belongs to:
Maths
Ratio and Proportion
Question #3
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If a:b = 4:4 and b:c = 4:9, then a:b:c = ?
Correct Answer: Option B
Explanation:
Combine ratios: a:b = 4:4, b:c = 4:9 ⇒ a:b:c = 4:4:9.
Combine ratios: a:b = 4:4, b:c = 4:9 ⇒ a:b:c = 4:4:9.
This question belongs to:
Maths
Ratio and Proportion
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