Question

EXERCISE 2C
per
year
A town has 15625 inhabitants. If the population of this town increases at the rate of 4% per
annum, find the number of inhabitants of the town at the end of 3 years.
The population of a town is increasing at the rate of 10% per annum. If its present population
is 36300, find : (i) its population after 2 years, (ii) its population 2 years ago.
The present population of a town is 176400. If the rate of growth in its population is 5%
annum, find : (i) its population 2 years hence, (ii) its population one year ago.
Three years ago, the population of a city was 50000. If the annual increase during three
successive years be 5%, 8% and 10% respectively, find the present population of the city.
A farmer has an increase of 12.5% in the output of wheat in his farm every year. This
he produced 2916 quintals of wheat. What was his annual production of wheat 2 years ago?
The population of a town is 64000. If the annual birth rate is 11.7% and the annual death
rate is 4.2%, calculate the population of the town after 3 years.
[Hint : Net growth rate = (11.7 - 4.2)% = 7.5%]
A mango tree was planted 2 years ago. The rate of its growth is 20% per annum. If at present,
the height of the tree is 162 cm, what it was when the tree was planted?
Two years ago, the population of a village was 4000. During next year it increased by 6% but
due to an epidemic, it decreased by 5% in the following year. What is its population now?
The count of bacteria in a culture grows by 10% during first hour, decreases by 8% during
second hour and again increases by 12% during third hour. If the count of bacteria in the
sample is 13125000, what will be the count of bacteria after 3 hours?​

Answer 1

Answer:

I don't understand what questions you ask