Dr. Lal and Jain Solutions for Chapter: Compound Interest, Exercise 1: Exercise

Kamal borrows $₹500$ from a bank. If the bank charges interest at $6\%$ per annum, how much amount shall he pay after $2$ years?

A sum of money placed at compound interest doubles itself in $4$ years. In how many years will it amount to $8$ times?

Find the compound interest of $₹10,000$ in $9$ months at $4\%$ per annum interest payable quarterly.

Some money was lent on $4\%$ compound interest. If the difference in the interest of the second and the first year is $₹88$, find the sum.

The population of a town is $50,000$. It decreases by $20$ percentage per year, Find out the population after $2$ years.

If the population of a town at present is $10648$ and the rate of increment is $10\%$ per year. What was the population before $3$ years ?

A father left a will of $₹16,400$ for his two sons aged $17$ and $18$ years. They must get equal amounts when they are $20$ years at $5\%$ compound interest. Find the present share of the younger son.

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