Explanation

Here,
Principal(P) = ₹3560
Amount(A) = ₹4521.20
Time(T) = 3 years
So,
S.I. =\left(Amount-Principal\right)
\therefore S.I. =₹\left(4521.20\;-\;3560\right)
\rightarrow S.I. =₹\ 961.20
We know, Rate =\large\frac{100\times S.I.}{P\times T}
\therefore Rate =\large\frac{100\times96120}{3560\times3\times100} _{[remove decimal]}
\rightarrow\ 9 % p.a.
Ans: Rate 9 % p.a.

Other forms of this specific math question are:

1. How to find the interest rate per annum when given a principal of ₹3560, an amount of ₹4521.20, and a time period of 3 years?
2. What is the annual interest rate when the principal is ₹3560, the amount is ₹4521.20, and the time is 3 years?
3. Finding the rate of interest per annum with a principal of ₹3560, an amount of ₹4521.20, and a duration of 3 years.
4. How to calculate the rate of interest per annum when the principal is ₹3560, the amount is ₹4521.20, and the duration is 3 years?