If simple Interest is 12.5% more than the principal and number of years(n), rate(r) are numerically in the ratio 2 : 1, then find the values of n, r.

1
n = 20, r = 10%
2
n = 14; r = 7%
3
n = 12, r = 6%
4
\(n = 15;r = 7\frac{1}{2}\%\)

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