A sum of money becomes 7/6 of itself in 3 years at a certain rate of simple int

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A sum of money becomes 7/6 of itself in 3 years at a certain rate of simple interest. The rate per annum is?

Options:

A . 5 5/9 %

B . 6 5/9 %

C . 18%

D . 25%

Answer: Option A

Let sum = x. Then, amount = 7x/6S.I. = 7x/6 - x = x/6; Time = 3 years.Rate = (100 * x) / (x * 6 * 3) = 5 5/9 %.

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