Question

principal=7200
rate=7%
time=5years
find the interest and total amount.​

Answer 1

I=P×R×T/100

I=7200×7×5/100

I =72×7×5

I =2520

A=7200-2520

= 4680

Answer 2

Given,

$\[\begin{array}{l}principal = 7200\\rate = 7\% \\time = 5years\end{array}\]$

Solution,

Consider the principal is p, rate of interest is r and time is t, then formula for interest,

$\[ = \frac{{p \times r \times t}}{{100}}\]$-----------(1)

Put the given values in equation 1,

$\[\begin{array}{l} = \frac{{7200 \times 7 \times 5}}{{100}}\\ = 72 \times 35\\ = 2520\end{array}\]$

Interest $\[ = 2520\]$

Amount,

= interest + principal

$\[\begin{array}{l} = 7200 + 2520\\ = 9720\end{array}\]$

Hence the interest is 2520 and total amount is 9720.