principal, rate of simple interest, and amount problems\nfind the period.\nprincipal = 2550 rupees\nannual…

Explanation:

Step1: Find the simple - interest amount

The formula for the total amount $A$ in simple - interest is $A = P+I$, where $P$ is the principal and $I$ is the simple interest. So, $I=A - P$. $I = 3888.75−2550=\ 1338.75$

Step2: Use the simple - interest formula to find the time period

The simple - interest formula is $I = P\times r\times t$, where $r$ is the rate of interest and $t$ is the time period. We know that $P = 2550$, $r=\frac{17.5}{100}=0.175$, and $I = 1338.75$. We can solve for $t$ from the formula $t=\frac{I}{P\times r}$. $t=\frac{1338.75}{2550\times0.175}$ $t=\frac{1338.75}{446.25}=3$

Answer:

$3$