Find population of a city after 2 years,which is at present 12 lakh,if the rate of increase is 4%.

The population of a city was 20,000 in the year 1997. It increased at the rate of 5% p.a. Find the population at the end of the year 2000.

The population of a city decreased from 25,000 to 24,500. Find the percentage decrease.

If a population growing exponentially double In size in 3 years, what is the intrinsic rate of Increase fr) of the population?

The radius of a soap-bubble is increasing at the rate of 0.2cm/s. Find the rate of increase of its volume when the radius is 5 cm.

If the radius of a circle is increasing at a uniform rate of 2 cm/s, then find the rate of increase of area of circt the instant when the radius is 20 cm.

The population of a certain is known to increase at a rate proportional to the number of people presently living in the country. If after two years the population has doubled, and after three years the population is 20,000 estimates the number of people initially living in the country.

On a certain sum the interest paid after 3 years is Rs.450 at 5% rate of interest per annum. Find the sum.

If Manohar pays an interest of Rs.750 for 2 years on a sum of Rs.4,500, find the rate of interest.