The simple interest on a sum for 5 years is two-fifth of the sum. The rate of interest per annum is
Let sum of money = Rs. $$5x$$
=> Simple interest = Rs. $$\frac{2}{5} \times 5x$$ = Rs. $$2x$$
Time period = 5 years
Let rate of interest = $$r\%$$
=> S.I. = $$\frac{P \times r \times t}{100}$$
=> $$\frac{5x \times r \times 5}{100}=2x$$
=> $$25r=100 \times 2=200$$
=> $$r=\frac{200}{25}=8\%$$
=> Ans - (B)
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