Question

How much time will it take for an amount of rs.450 to yield rs.81 as interest at 4.5% per annum of simple interest ?

Answer 1

Given
P=450
R=4.5%
S.I=81
T=?
S.I.=prt/100
81=450x4.5xt/100
T=81x100/450x4.5
T=4 years

Answer 2

i think 40 years will take.
because Time=SI*100/rate*principal