Advertisements
Advertisements
Question
The population of a city is 1,25,000. If the annual birth rate and death rate are 5.5% and 3.5% respectively. Calculate the population of the city after 3 years.
Solution
Here net growth = (5.5 - 3.5)% = 2%
P = ₹ 1,25,000
n = 3 years
∴ Population of the city after 3 years
= 1,25,000 `(1 + 2/100)^3`
= 1,25,000 `((102)/(100))^3`
= 1,25,000 x `(102 xx 102 xx 102)/(100 xx 100 xx 100)`
= 1,32,651.
APPEARS IN
RELATED QUESTIONS
Manoj borrowed Rs 25,000 from Sohan at 8.4 % p.a. compound interest. After 2 years Manoj cleared Rs 17,500 and a motorcycle. Find the cost of the motorcycle.
The cost of a machine depreciated by Rs 2592 during the third year and by Rs 2332.80 during the fourth year. Calculate :
The rate of depreciation.
The cost of a machine depreciated by Rs 2592 during the third year and by Rs 2332.80 during the fourth year. Calculate :
The original cost.
Calculate the amount and the compound interest for the following, when cornpounded half-yearly:
Rs 25,000 for `1 1/2` years at 12 %
What sum of money will amount to Rs 10,256.40 in 3 years at compound interest if the rates of interest for the successive years are 10%, 11% and 12%?
What sum of money will amount to Rs 15,746.40 at 16% p.a. compounded half-yearly?
On what sum of money will the compound interest for `2 1/2` years at 12% per annum amount to Rs 8,241.60?
On what sum of money will the compound interest for 2 years at 10% p.a. compounded half-yearly amount to Rs 3,448.10?
A sum of money placed at compound interest compounded annually amounts to Rs 26,460 in 2 years and to Rs 29,172.15 in 4 years. Calculate the rate of interest and the sum.
The cost of a machine depreciates by 10% every year. If its present worth is Rs.18,000; what will be its value after three years?
