The population of country increases at the rate proportional to the number of inhabitants. If the population doubles in 30 years, in how many years will it treble? Given `log_(e)3=1.6log_(e)2`.

The population of a country increases at a rate proportional to the number of inhabitants. f is the population which doubles in 30 years, then the population will triple in approximately. (a) 30 years (b) 45 years (c) 48 years (d) 54 years

The population of a village increases continuously at the rate proportional to the number of its inhabitants present at any time.If the population of the village was 20,000 in 1999 and 25000 in the year 2004, what will be the population of the village in 2009?

The population of a country doubles in 50 years. Assuming that the rate of increase of population is proportional to the number of inhabitants, in how many years would the population becomes three times ?

If the rate of increase of population is 5% per year, then in how many years the population will be doubled?

If the rate of increase of population is 5% per year, then in how many years the population will be doubled?

The present population of a town is 1280000. If it increases at the rate of 6(2)/3% per annum, its population two years ago was :

Current population of a village is P and rate of increase of the population per annum is 2r%. Then the population after n years will be____

The population of a state increases by 10% per 3 years. If the present population of the state be 3993000, then what was the population of the state before 6 years?

The population of a town is 8000. After how many years the population of the town will be 9261 if the rate of growth of the population be 5%.

The present population of a town is 576000. If the rate of increase of population be 6 2/3% per annum, then what was the population of the twon before 2 years?