Question

if the simple interest on rs205 in 4 years is rs28.70,find the rate of interest percent per annum

Answer 1

if i= 28.7
t=4
p=205

since i=prt/100
therefore r=100×i/pt
i.e., r= 100×28.7/205×4
r=3.5

Answer 2

Here is your answer in the attachment

Hope it helps you