Advertisements
Advertisements
प्रश्न
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.
Advertisements
उत्तर
Population after three years = P \[\left( 1 + \frac{R}{100} \right)^3 \]
\[175, 760 = P \left( 1 + \frac{40}{1000} \right)^3 \]
\[175, 760 = P \left( 1 . 04 \right)^3 \]
\[P = \frac{175, 760}{1 . 124864}\]
\[ = 156, 250\]
Thus, the population three years ago was 156, 250.
संबंधित प्रश्न
Compute the amount and the compound interest in the following by using the formulae when:
Principal = Rs 160000, Rate = 10 paise per rupee per annum compounded half-yearly, Time = 2 years.
The population of a city increases each year by 4% of what it had been at the beginning of each year. If the population in 1999 had been 6760000, find the population of the city in (i) 2001 (ii) 1997
The population of a city increases each year by 4% of what it had been at the beginning of each year. If the population in 1999 had been 6760000, find the population of the city in (i) 2001 (ii) 1997.
.
The value of a machine depreciates at the rate of 10% per annum. What will be its value 2 years hence, if the present value is Rs 100000? Also, find the total depreciation during this period.
Pritam 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 refrigerator which was purchased 2 years ago, depreciates at 12% per annum. If its present value is Rs 9680, for how much was it purchased?
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.
To start a business, Shalaka has taken a loan of ₹8000 at a rate of 10 `1/2` p.c.p.a. After two years, how much compound interest will she have to pay?
Find the compound interest if the amount of a certain principal after two years is ₹ 4036.80 at the rate of 16 p.c.p.a.
The population of a suburb is 16000. Find the rate of increase in the population if the population after two years is 17640.
