In 4 years, the SI on a certain sum of money is $$\frac{7}{25}$$ of the principal. What is the annual rate of interest?
SI =ย $$\frac{PTR}{100}$$
Given SI = 7/25P when t=4
$$\frac{7}{25}P\ =\frac{4PR}{100}$$
=> R=7
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