Advertisements
Advertisements
प्रश्न
The population of a city is 125000. If the annual birth rate and death rate are 5.5% and 3.5% respectively, calculate the population of city after 3 years.
उत्तर
Here, P = Initial population = 1,25,000
Annual birth rate = `"R"_1` = 5.5 %
Annual death rate = `"R"_2` = 3.5 %
Net growth rate, R = \[\left( R_1 - R_2 \right) = 5.5 - 3.5 = 2 %\]
n = Number of years = 3
∴ Population after three years = P \[ \left( 1 + \frac{R}{100} \right)^n \]
\[=1,25,000\left(1+\frac{2}{100}\right)^3 \]
\[=1,25,000\times\left(1.02\right)^3\]
\[= 1,32,651\]
Hence, the population after three years will be 1,32,651.
APPEARS IN
संबंधित प्रश्न
The population of a place increased to 54000 in 2003 at a rate of 5% per annum Find the population in 2001.
A scooter was bought at Rs 42,000. Its value depreciated at the rate of 8% per annum. Find its value after one year.
Compute the amount and the compound interest in the following by using the formulae when:
Principal = Rs 10000, Rate 20% per annum compounded half-yearly, Time = 2 years
The difference between the compound interest and simple interest on a certain sum at 15% per annum for 3 years is Rs 283.50. Find the sum.
The compound interest on Rs 1800 at 10% per annum for a certain period of time is Rs 378. Find the time in years.
The population of a certain city was 72000 on the last day of the year 1998. During next year it increased by 7% but due to an epidemic it decreased by 10% in the following year. What was its population at the end of the year 2000?
The population of a town increases at the rate of 40 per thousand annually. If the present population be 175760, what was the population three years ago.
Ashish started the business with an initial investment of Rs 500000. In the first year he incurred a loss of 4%. However during the second year he earned a profit of 5% which in third year rose to 10%. Calculate the net profit for the entire period of 3 years.
The population of a suburb is 16000. Find the rate of increase in the population if the population after two years is 17640.
The population of a town was decreasing every year due to migration, poverty and unemployment. The present population of the town is 6,31,680. Last year the migration was 4% and the year before last, it was 6%. What was the population two years ago?
