Question

pls answer as fast as possible

Answer 1

$si = \frac{p \times r \times t}{100} \\ 81 = \frac{450 \times 4.5 \times t}{100} \\ t = \frac{81 \times 100}{450 \times 4.5} \\ t = 4....answer$

Answer 2

i guess it will take 4 yrs to yield Rs.81 on an amount of 450 at 4.5%p.a