If a:b = 7:10 and b:c = 10:11, then a:b:c = ? MCQ with Answer and Explanation
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Question #1
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If a:b = 6:3 and b:c = 3:6, then a:b:c = ?
Correct Answer: Option C
Explanation:
Combine ratios: a:b = 6:3, b:c = 3:6 ⇒ a:b:c = 6:3:6.
Combine ratios: a:b = 6:3, b:c = 3:6 ⇒ a:b:c = 6:3:6.
This question belongs to:
Maths
Ratio and Proportion
Question #2
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Ratio of present ages of A and B is 7:4. After 7 years, the ratio becomes 10:5. Present age of A is?
Correct Answer: Option C
Explanation:
Let ages 7k and 4k. Then (7k + 7)/(4k + 7) = 10/5. Solving gives k ≈ 12, age of A = 7*12 = 84.
Let ages 7k and 4k. Then (7k + 7)/(4k + 7) = 10/5. Solving gives k ≈ 12, age of A = 7*12 = 84.
This question belongs to:
Maths
Ratio and Proportion
Question #3
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Milk and water are in ratio 8:6 in a 373 L mixture. Quantity of milk?
Correct Answer: Option B
Explanation:
Total parts = 14. Milk = [8 / (8+6)] × 373 = 213 L.
Total parts = 14. Milk = [8 / (8+6)] × 373 = 213 L.
This question belongs to:
Maths
Ratio and Proportion
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