Uniform Rate of Increase or Decrease

The rate of depreciation of a car is $10\%$ per annum. Its present worth is$₹81000$. What was its worth $2 \mathrm{years}$ ago?

The population of a place was initially $13310$. After $3$ years it becomes $17280$. If the population increases uniformly every year. What is the rate of increase?

A machine worth ₹ $4,90,740$ is depreciated at $15\%$ on its opening value each year. When its value would reduce to ₹ $2,00,000$?

The annual birth and death rates per $1,000$ are $39.4$ and $19.4$ respectively. The number of years in which the population will be doubled assuming there is no immigration or emigration is____.

The height of a tree increases by $25\%$ per annum. If the present height of the tree is $20$ metres, then what will be the height of the tree after $2$ years?

The value of a bike depreciates at the rate of $10\%$ per annum. It was purchased $3$ years ago. If its present value is$\mathrm{Rs}. 43740$ , find its purchase price.

Mohan purchased a house for $\mathrm{Rs}. 30000$ and its value is depreciating at the rate of $25\%$ per year. Find the value of the house after$3$ years.

Ram bought a plot of land for Rs. 640000. Its value is increasing by 5% of its previous value after every six months. What will be the value of the plot after 2 years?

 The value of a machine depreciates at the rate of $8\%$ per annum. What will be its value $2$ years hence, if the present value is $\mathrm{Rs}. 125000$? Also, find the total depreciation during this period.

 The population of a city increases at the rate of $75$ per thousand annually. If the present population be 150000, what will be the population after two years?

The count of bacteria in a culture grows by $10\%$ in the first hour, decreases by $5\%$ in the second hour and again increases by $15\%$ in the third hour. If the count of bacteria in the sample is $5000000$, what will be the count of bacteria after $3$ hours?

The value of a machine of factory decreases by $5\%$ per year. If the present value of the machine be $\mathrm{Rs}. 75000$ then what will be the value of it after $2$ year?

The annual rate of growth in population of a certain city is $6\%$. If its present population is $112360$, what it was $2$ years ago?

In a factory, the production of trucks rose to $33075$ from $30000$ in $2$ years. Find the annual rate of growth of the production of trucks.

The present population of a town is $20000$. It grows at $4\%, 5\%$ and $7\%$ during the first year, second year and third year, respectively. Find its population after $3$ years.

The population of a town is $10000$ in a certain year. It increases at the rate of $5\%$ in the first year and $10\%$ in the second year. Find the net growth in two year.

The population of a town is $35000$ in a certain year. It increases at the rate of $4\%$ per annum. What will be its population after $2$ years? Also find its net growth.

The present population of a town is $28000$. If it increases at the rate of$5\%$ per annum, what will be its population after $2$ years?

The present population of a town in Mumbai is $4,50,000$. It is decreasing at the rate of $12\%$ every year. What will be the population after $2 years$

The present population of a city of West Bengal is $3,50,000$. It is incrementing at the rate of $13\%$ every year. What will be the population of that town after $2 years$.