Question: If rupee one produces rupees nine over a period of 40 years, find the rate of simple interest?\nOptions:\n(A) 22 1/2 %\n(B) 22%\n(C) 21 %\n(D) 30%\n(E) 40 % Let's think first. Some random reasoning:
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9 = (1*40*R)/100\nR = 22 1/2 % The final answer: (A).
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