Question

If the balance at the end of nine years on an investment of Rs. $1500$ that has been invested at a rate of $5$ $\%$ is Rs. $4000$, how much was the interest?

• A. $1500$
• B. $2000$
• C. $1800$
• D. $1700$

Answer 1

The correct option is C $1800$

Simple interest, $I=$ $\frac{PRT}{100}$
Where, $P=$ principal $=$ Rs. $4000$
$R=$ rate $=5\%$
$T=$ time period $=9$ years
Therefore, $I=$ $\frac{4000\times 5\times 9}{100}$
$\Rightarrow I=$ Rs. $1800$