M L Aggarwal Solutions for Exercise 5: Chapter Test

The simple interest on a certain sum for $3$ years is $Rs 1080$ and the compound interest on the same sum at the sum rate for $2$ years is $Rs 741.60$. Find the rate of interest.

The simple interest on a certain sum for $3$ years is $Rs 1080$ and the compound interest on the same sum at the sum rate for $2$ years is $Rs 741.60$. Find the principal.

In what time will $₹2400$ amount to $₹2646$ at $10\%$ per annum compounded semi-annually?

Sudarshan invested $Rs 60000$ in a finance company and received $Rs 79860$ after $1\frac{1}{2}$ years. Find the rate of interest per annum compounded half-yearly.

The population of a town is $320000$. If the annual birth rate is $9.2\%$ and the annual death rate is $1.7\%$, calculate the population of the town after $3$ years.

The cost of a car, purchased $2$ years ago, depreciates at the rate of $20\%$ per year. If its present value in $₹ 315600$; find its value, when it was purchased $2$ years ago.

The cost of a car, purchased $2$ years ago, depreciates at the rate of $20\%$ per year. If its present value in $₹ 315600$; find its value after $3$ years.

Amar singh started a business with an initial investment of $RS.4,00,000.$ In the first year he incured a loss of $4\%$ However during the second year he earned a profit of $5\%$ which in the third year rose to $10\%$ Calculater his net profit for the entire period of $3$ years.