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Two brothers have age in the ratio of 3 ∶ 8. If the ratio of the age of elder brother after 20 years to the double of the present age of younger brother is 3 ∶ 1. What was the ratio of their age 5 years ago (elder ∶ younger)?
  • a)
    11 ∶ 1
  • b)
    24 ∶ 5
  • c)
    1 ∶ 12
  • d)
    10 ∶ 13
Correct answer is option 'A'. Can you explain this answer?
Verified Answer
Two brothers have age in the ratio of 3 ∶ 8. If the ratio of the...
Let the current age of younger brother and elder brother be 3X and 8X respectively.
Age of elder brother 20 years from now = 20 + 8X
Age of younger brother after he doubles in age = 2 × 3X = 6X
This ratio is 3 ∶ 1
This means (20 + 8X)/6X = 3/1
⇒ 20 + 8X = 18X
⇒ X = 2
Age of younger brother = 6 years
Age of elder brother = 16 years
Ages of brothers 5 years ago = 1, 11
The ratio comes out to be 11 ∶ 1
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Two brothers have age in the ratio of 3 ∶ 8. If the ratio of the age of elder brother after 20 years to the double of the present age of younger brother is 3 ∶ 1. What was the ratio of their age 5 years ago (elder ∶ younger)?a)11 ∶ 1b)24 ∶ 5c)1 ∶ 12d)10 ∶ 13Correct answer is option 'A'. Can you explain this answer?
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Two brothers have age in the ratio of 3 ∶ 8. If the ratio of the age of elder brother after 20 years to the double of the present age of younger brother is 3 ∶ 1. What was the ratio of their age 5 years ago (elder ∶ younger)?a)11 ∶ 1b)24 ∶ 5c)1 ∶ 12d)10 ∶ 13Correct answer is option 'A'. Can you explain this answer? for Defence 2024 is part of Defence preparation. The Question and answers have been prepared according to the Defence exam syllabus. Information about Two brothers have age in the ratio of 3 ∶ 8. If the ratio of the age of elder brother after 20 years to the double of the present age of younger brother is 3 ∶ 1. What was the ratio of their age 5 years ago (elder ∶ younger)?a)11 ∶ 1b)24 ∶ 5c)1 ∶ 12d)10 ∶ 13Correct answer is option 'A'. Can you explain this answer? covers all topics & solutions for Defence 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Two brothers have age in the ratio of 3 ∶ 8. If the ratio of the age of elder brother after 20 years to the double of the present age of younger brother is 3 ∶ 1. What was the ratio of their age 5 years ago (elder ∶ younger)?a)11 ∶ 1b)24 ∶ 5c)1 ∶ 12d)10 ∶ 13Correct answer is option 'A'. Can you explain this answer?.
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