If a:b = 3:10 and b:c = 10:5, then a:b:c = ? MCQ with Answer and Explanation
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Question #1
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If a:b = 5:4 and b:c = 4:4, then a:b:c = ?
Correct Answer: Option A
Explanation:
Combine ratios: a:b = 5:4, b:c = 4:4 ⇒ a:b:c = 5:4:4.
Combine ratios: a:b = 5:4, b:c = 4:4 ⇒ a:b:c = 5:4:4.
This question belongs to:
Maths
Ratio and Proportion
Question #2
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Ratio of present ages of A and B is 6:5. After 5 years, the ratio becomes 9:6. Present age of A is?
Correct Answer: Option B
Explanation:
Let ages 6k and 5k. Then (6k + 5)/(5k + 5) = 9/6. Solving gives k ≈ 15, age of A = 6*15 = 90.
Let ages 6k and 5k. Then (6k + 5)/(5k + 5) = 9/6. Solving gives k ≈ 15, age of A = 6*15 = 90.
This question belongs to:
Maths
Ratio and Proportion
Question #3
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Milk and water are in ratio 3:5 in a 587 L mixture. Quantity of milk?
Correct Answer: Option B
Explanation:
Total parts = 8. Milk = [3 / (3+5)] × 587 = 220 L.
Total parts = 8. Milk = [3 / (3+5)] × 587 = 220 L.
This question belongs to:
Maths
Ratio and Proportion
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