Jharne De and Ranjana Kumar Solutions for Chapter: Simple Interest and Compound Interest, Exercise 5: Test Paper 1

The present population of a town is $2,85,000$. If it is increasing at the rate of $5\%$ per annum, then what will be its population after $5$ years?

The population of a city is growing every year at $8\%$. If the present population is $2,62,236$, then how much was the population two years ago?

A factory increases the production of its machine parts from $80,000$ to $92,610$ in $3$ years. Find the rate of growth.

The value of a car depreciates every year at the rate of $8\%$ per annum. What will be the value of the car after $3$ years if its current value is $₹1,20,000$?

A machine costs $₹36,000$. Its value depreciates at the rate of $10\%$ during the first year and then increases at the rate $20\%$ during the second year. Find the value of the machine after $2$ years.

Atulya started a business with an annual investment of $₹64,000$. During the first year he incurred a loss of $4\%$. However during the second year he earned a profit of $5\%$ which rose to $10\%$ during third year. Find the net profit earned by him at the end of $3$ years.

The value of an old brass vase depreciates at the rate $10\%$ per annum. If the present value is $5,000$. Find the time after which its value will be reduced to $₹3,645$.

The cost of a washing machine is $₹10,000$. If it costs reduces to $₹7,290$ in $3$ years. Then find the rate of depreciation.