Question

nikhil pays an intrest of ₹500 for 5 years on a sum of ₹4000.find the rate of interest

Answer 1

so
r/p×100
500×100/4000
12.5% rate.....

Answer 2

SI=P*R*T
P=A+I
P=4500
500=4500×R×5÷100
500=225×R
500/225=R
100/45=R
20/9%=R