Question

Angela deposited 15000 rupees in a bank at a rate of 9 p.c.p.a. She got simple interest amounting to 5400 rupees. For how many years had she deposited the amount?

Answer 1

Amount deposited = Rs 15000
Rate of interest = 9%
Simple interest = Rs 5400
Let the number of years be n.
SI = $\frac{\mathrm{PRT}}{100}$
$$\begin{gathered} \Rightarrow 5400=\frac{15000\times 9\times n}{100} \\ \Rightarrow \frac{5400\times 100}{15000\times 9}=n \\ \Rightarrow n=4 \end{gathered}$$
Thus, the number of years for which she had deposited the money is 4 years.