Simple Interest

Simple interest on $₹1000$ at $5\%$ per annum for $73$ days is $₹10$.

A sum doubles itself at simple interest at $10\%$ per annum in $10$ years.

Simple interest on $₹x$ for $x$ years is $₹x$. Then, the rate of interest is $x\%$ per annum.
 

What sum will amount to $₹6600$ in $2$ years at $10\%$ per annum simple interest?

Find the simple interest on $₹6300$ at $8\%$ per annum for $8$ months.

In what time will $₹8000$ amount to $₹8360$ at $6\%$ per annum simple interest?

At simple interest a sum becomes $\frac{6}{5}$ of itself in $2\frac{1}{2}$ years. The rate of interest per annum is

A sum amounts to $₹3605$ in $219$ days at $5\%$  per annum. The sum is
 

The simple interest on $₹6250$ at $4\%$ per annum for $6$ months is

Find simple interest and amount when principal $=₹5000$, rate $=9\%$ p.a. and time$= 146$ days.

Find simple interest and amount when principal $=₹ 9600$, rate $= 7\frac{1}{2}\%$ p.a. and time$=5$ months.

Find simple interest and amount when principal$=₹1500$, rate $= 12\%$ p.a. and time$=3$ years $3$ months.

Find simple interest and amount when principal$=₹2650$, rate $= 8\%$ p.a. and time$=2\frac{1}{2}$ years

Find simple interest and amount when principal$=₹6400$, rate $= 6\%$ p.a. and time$=2$ years.