Simple Interest

The simple interest on a sum of money is $\frac{1}{4}$th of the principal and the number of years is equal to rate percent per annum. Find the rate percent.

Evaluate:

You deposit $₹1200$ into your account on $8\%$ simple annual interest. The balance in your account after $3$ years is?

If the annual rate of simple interest increases from $10\%$ to $12\frac{1}{2}\%,$ a man's yearly income increases by $₹1250$. His principal $($in $₹$$)$ is

The sum of the principal and the interest on it for any period is called the _____.

A sum lent out at simple interest becomes $₹4480$ in $3$ years and $₹4800$ in $5$ years. Find the sum and the rate of interest.

Find the simple interest and amount when

Principal$=₹400$, Rate$=10$ paise per rupee per annum, Time = $6$ months

Find the simple interest and amount when

Principal = $₹850,$ Rate = $1.5$$\%$ per month, Time = $1.3$ years 

Find the simple interest and amount when

Principal = $₹750,$ Rate = $9$$\%$ p.a., Time = $5$ years 

Find the simple interest and amount when

Principal = $₹600,$ Rate = $8$$\%$ p.a., Time = $2$ years 

Find the simple interest and amount when

Principal$=₹300,$ Rate$=12$$\%$ p.a., Time$=8$ months.

At same rate of simple interest, $A$ lent $₹6000$ to $B$ for $2$ years and $₹1500$ to $C$ for $4$ years and received $₹900$ as interest from both of them together. The rate of interest per annum was

Divide $₹2500$ into two parts such that the simple interest on one at $4\%$ for $5$ years is double that of the other at $5\%$ for $3$ years.

Amar and Chaman borrowed $₹2250$ and $₹2500$ respectively at the same rate of simple interest for $3\frac{1}{2}$ years. If Chaman paid $₹140$ more interest than Amar, find the rate of interest per annum.

Two equal sums were lent out at $7$$\%$ and $5\%$ interest respectively. The interests earned on the two loans add up to $₹960$ for $4$ years. What is the total sum lent out?

Sameer lent equal sums of money at $5\frac{1}{2}$ percent and $4$ percent per annum respectively for a period of $3$ years. If he earned $₹72$ more for the money lent out at $5\frac{1}{2}\%$, if the sum of money is $₹k$, then, find the value of $k$ lent at $4\%.$

If $₹450$ amounts to $₹540$ at $4$ years at simple interest, find the sum that will amount to $₹637.50$ in $5$ years at the same rate of interest.

A sum amounts to $₹1326$ in $6$ years at $5$$\%$ p.a. simple interest. In what time will this sum double itself at the same rate of interest?

$₹7000$ left in a bank for $10$ years at simple interest amounts to $₹9800$. Then, the total amount after another $5$ years at the same rate is

How long will it take $₹10$$0$ to triple itself at $5\%$ simple interest?

At what rate will$₹100$ double itself in $7$ years at simple interest?