ANSWER:
Rate per annum at which CI will amount from RS 2000 to RS 2315.35 in 3 years is 5%
SOLUTION:
Given,
P = RS 2000
C.I = RS 2315.35
T = 3 years
We need to find the rate per annum. i.e. R = ?
We know that,
When interest is compound Annually:

Where p = principal amount
r = rate of interest
n = number of years



![$1+(R)/(100)=\sqrt[3]{1.157}$](https://img.qammunity.org/2020/formulas/mathematics/middle-school/3ah302r2yteh7r4k10sp4ov4tg64x7mi89.png)



R = 5%
Hence, rate per annum is 5 percent.