Question

the population of city was 20000 in year 1998. it increased at the rate of 5% per annum. its population at the end of year 2000 is..

Answer 1

time =2years
p = 20000
rate(r) =5%
so population after 5 year = 20000×(21/20)^2
=50×21×21= 22050

Answer 2

$20000(5 \div 100 + 1) ^{2}$
22050