Question

solve it fast its urgent

Answer 1

let the principal be p,
rate of interest r
time -6yrs
simple interest - 9/25p
$si = \frac{prt}{100} \\ \frac{9}{25} p = \frac{6pr}{100} \\ r = \frac{9p \times 100}{25 \times 6p} \\ r = 6$
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Answer 2

1. Let P be principle.
2. Given interest=(9/25)p
3. SI=PTR/100
4. (9/25)p=p*6*r/100
5. from this equation we get r=6%