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The simple interest, sum of money becomes 3 times of itself in 20 rupees. In how many years does it become double of itself at same rate of interest?

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The simple interest, sum of money becomes 3 times of itself in 20 rupees. In how many years does it become double of itself at same rate of interest? Answer: 10 years

If a sum triples in 20 years, that means the interest alone is 2 times the principal (since the final amount is 3P = P + 2P). So, 2P interest in 20 years → implies 1P interest in 10 years. Thus, the sum doubles (P + P) in 10 years.

Question context

This question is part of 📏 Arithmetic Aptitude within the broader 🧠 Aptitude Mastery subject and appears in the PPSC Punjab Public Service Commission preparation collection. Reviewing the answer together with nearby questions helps reinforce the underlying concept and identify how it may appear in competitive exams.