Arihant Expert Team Solutions for Exercise 1: Practice Questions

What approximate amount of compound interest can be obtained on an amount of $\text{Rs}. 9650$ at the rate of $6\text{\%}$ per annum at the end of $3$ years?

The simple interest obtained when a sum of money is invested for $4$ years at $18\text{\%}$ per annum is $\text{Rs}. 427$ more than the simple interest obtained if the same sum of money is invested for $2$ years at $22\text{\%}$ per annum. What is the amount obtained when the same sum of money is invested for $4$ years at $18\text{\%}$ per annum?

A sum of $Rs.7700$ is lent out in two parts in such a way that the interest on one part at $20\text{\%}$ for $5$ years is equal to that on another part at $9\text{\%}$ for $6$ years. Find the second part.

A certain sum at compound interest amounts to $Rs. 12920$ in $2$ years and to $Rs. 13176$ in $3$ years. The rate per cent per annum is _____.

The population of a city increases at the rate of $5\%$ per annum. If the present population of the city is $370440$. What was its population $3$ years ago?

Sonia borrowed $Rs. 1000$ from Anil at the rate of $16\%$ per annum. How much interest will she have to pay at the end of $8$ months? Also, find the total amount paid.

I borrowed some money at $8\%$ per annum. I had to pay $Rs. 138.75$ as interest after $3$ year and one month. What sum did I borrowed?

Mr. Khanna took a loan of $Rs. 10000$ on simple interest for $2$ years at the rate of $3\%$ per annum. The total amount that he will be paying as interest in $2$ years is $3\%$ of his monthly salary. What is his monthly salary?