Question

at what interest rate per annum will be 400 became 475 in three years​

Answer 1

Answer:

Given,

Principal (P)= 400

Interest (I)=475

Time(t)=3 yrs

Rate(R)=?

Here,

I=PTR/100

or,

R=I*100/PT

=475*100/1200

=39.58% p.a.

Answer 2

Answer:

R=100 xl/pxn, R rate, Interest

P=principal, n=no. of yrs

R=100x75 / 400x3=25/4=6.25%