Question

city a has a population of 136000 which is decreasing at the rate of 2400 per year city b has a population of 84000 which is increasing at the rate of 1600 per year. in how many years, will the population of two cities become equal?????​

Answer 1

Answer:

City a population =136000

City b population =84000

Let after X year population of both cities will be equal

accordingly

136000_2400X=84000+1600X

2400X + 1600X=136000_84000

4000X = 52000

X = 52000÷4000 =13

After 13 year population of both cities will be equal