Two numbers are in the ratio 7:15 and their sum is 349. Find the numbers. MCQ with Answer and Explanation

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Two numbers are in the ratio 7:15 and their sum is 349. Find the numbers.

A. 210 and 450

B. 105 and 225

C. 94 and 237

D. 115 and 199

Answer: Option B

Solution (By JKSSB Mock Tests)

Numbers = 7k and 15k. 7k + 15k = 349 ⇒ k = 15. Thus, numbers are 105 and 225.

This question belongs to: Maths Ratio and Proportion

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Practice More Ratio and Proportion Questions

Question #1

Find the mean proportional between 7 and 35.

A. 30

B. 42

C. 18

D. 15

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Correct Answer: Option D

Explanation:
Mean proportional = √(7 × 35) = √(245) = 15.

This question belongs to: Maths Ratio and Proportion

Question #2

If a:b = 7:9 and b:c = 9:8, then a:b:c = ?

A. 7:9:8

B. 7:10:8

C. 14:18:16

D. 6:9:9

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Correct Answer: Option A

Explanation:
Combine ratios: a:b = 7:9, b:c = 9:8 ⇒ a:b:c = 7:9:8.

This question belongs to: Maths Ratio and Proportion

Question #3

Ratio of present ages of A and B is 6:5. After 5 years, the ratio becomes 9:6. Present age of A is?

A. 180 years

B. 95 years

C. 90 years

D. 85 years

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Correct Answer: Option C

Explanation:
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

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