Two numbers are in the ratio 10:13 and their sum is 790. Find the numbers. MCQ with Answer and Explanation
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Question #1
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Find the mean proportional between 17 and 42.
Correct Answer: Option A
Explanation:
Mean proportional = √(17 × 42) = √(714) = 26.
Mean proportional = √(17 × 42) = √(714) = 26.
This question belongs to:
Maths
Ratio and Proportion
Question #2
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Ratio of present ages of A and B is 4:6. After 9 years, the ratio becomes 7:8. Present age of A is?
Correct Answer: Option D
Explanation:
Let ages 4k and 6k. Then (4k + 9)/(6k + 9) = 7/8. Solving gives k ≈ 22, age of A = 4*22 = 88.
Let ages 4k and 6k. Then (4k + 9)/(6k + 9) = 7/8. Solving gives k ≈ 22, age of A = 4*22 = 88.
This question belongs to:
Maths
Ratio and Proportion
Question #3
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Find the mean proportional between 32 and 50.
Correct Answer: Option D
Explanation:
Mean proportional = √(32 × 50) = √(1600) = 40.
Mean proportional = √(32 × 50) = √(1600) = 40.
This question belongs to:
Maths
Ratio and Proportion
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