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Time to double investment if it triples in 20 years (Simple Interest):

Question: Time to double investment if it triples in 20 years (Simple Interest):
  • A. 15 years
  • B. 10 years ✓
  • C. 12 years
  • D. 5 years
Correct Answer: B. 10 years
Explanation: Tripling in 20 years means interest = 2P. Using SI = PRT, T = 10 years to double (P to 2P).

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