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Q:

A sum triple itself in 9 years at simple interest. Find the rate of interest per annum is.

  • 1
    $$38{2\over 9} \% $$
  • 2
    $$33{1\over 3} \% $$
  • 3
    $$27{1\over 9} \% $$
  • 4
    $$22{2\over 9} \% $$
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Answer : 4. "$$22{2\over 9} \% $$"

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