Milk and water are in ratio 9:6 in a 433 L mixture. Quantity of milk? MCQ with Answer and Explanation
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Question #1
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Find the mean proportional between 28 and 49.
Correct Answer: Option B
Explanation:
Mean proportional = √(28 × 49) = √(1372) = 37.
Mean proportional = √(28 × 49) = √(1372) = 37.
This question belongs to:
Maths
Ratio and Proportion
Question #2
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Ratio of present ages of A and B is 5:4. After 4 years, the ratio becomes 6:7. Present age of A is?
Correct Answer: Option D
Explanation:
Let ages 5k and 4k. Then (5k + 4)/(4k + 4) = 6/7. Solving gives k ≈ 9, age of A = 5*9 = 45.
Let ages 5k and 4k. Then (5k + 4)/(4k + 4) = 6/7. Solving gives k ≈ 9, age of A = 5*9 = 45.
This question belongs to:
Maths
Ratio and Proportion
Question #3
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If a:b = 5:7 and b:c = 7:7, then a:b:c = ?
Correct Answer: Option A
Explanation:
Combine ratios: a:b = 5:7, b:c = 7:7 ⇒ a:b:c = 5:7:7.
Combine ratios: a:b = 5:7, b:c = 7:7 ⇒ a:b:c = 5:7:7.
This question belongs to:
Maths
Ratio and Proportion
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