R. Gupta Solutions for Chapter: Compound Interest, Exercise 1: EXERCISE

The simple interest on a sum of money for $2$ years is Rs. $400$ and the compound interest on the same sum for the same period and at the same rate is Rs. $410$. Find the rate percent per annum.

The difference between simple and compound interest on a sum of $₹$$2000$ for $3$ years at $20\%$ per annum will be:

A sum of money placed at compound interest amounts to Rs. $800$ in $4$ years and to Rs. $840$ in $5$ years. In $6$ years this will amount to:

A borrowed from a bank Rs. $8000$ for $2$ years at $5\%$ per annum compound interest and B borrowed from a moneylender a certain sum of money for $3$ years at $4\%$ per annum compound interest. If after expiry of their respective loan periods, each of them pay an equal amount to clear off their debts, find the sum of money borrowed by B from the moneylender.

A man purchased a sewing machine for Rs. $5000$. If due to sustained use value of this sewing machine depreciates by $6\%$ annually, find its value after $3$ years.

What will be the difference between compound and simple interest on Rs. $11000$ for $2$ years at $6\%$ per annum?

Find the sum on which the difference between compound and simple interest for $3$ years at $10\%$ per annum will be Rs. $868$.

Two friends A and B jointly lent out Rs. $81,600$ at $4\%$ per annum compound interest, payable annually. $2$ years after A gets the same amount as B gets after $3$ years. The investment made by B was: