A sum of money, put at simple interest trebles itself in 15 years. The rate per cent per annum is :
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A sum of money, put at simple
interest trebles itself in 15 years.
The rate per cent per annum is : (a) 40/3 % (b) 50/3 % (c) 38/3 % (d) 20 % Correct answer: a Solution :
