Two numbers are in the ratio 10:13 and their sum is 454. Find the numbers. MCQ with Answer and Explanation
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Question #1
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If a:b = 7:8 and b:c = 8:7, then a:b:c = ?
Correct Answer: Option D
Explanation:
Combine ratios: a:b = 7:8, b:c = 8:7 ⇒ a:b:c = 7:8:7.
Combine ratios: a:b = 7:8, b:c = 8:7 ⇒ a:b:c = 7:8:7.
This question belongs to:
Maths
Ratio and Proportion
Question #2
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Ratio of present ages of A and B is 5:7. After 12 years, the ratio becomes 7:10. Present age of A is?
Correct Answer: Option C
Explanation:
Let ages 5k and 7k. Then (5k + 12)/(7k + 12) = 7/10. Solving gives k ≈ 17, age of A = 5*17 = 85.
Let ages 5k and 7k. Then (5k + 12)/(7k + 12) = 7/10. Solving gives k ≈ 17, age of A = 5*17 = 85.
This question belongs to:
Maths
Ratio and Proportion
Question #3
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Milk and water are in ratio 9:3 in a 408 L mixture. Quantity of milk?
Correct Answer: Option C
Explanation:
Total parts = 12. Milk = [9 / (9+3)] × 408 = 306 L.
Total parts = 12. Milk = [9 / (9+3)] × 408 = 306 L.
This question belongs to:
Maths
Ratio and Proportion
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