A city doubles its size every 48 years. If the population is currently 400,000, what will the population be in 144 years?

The population after 144 years is 32,00,000.

Explanation:

Time, t = 48 years

Current population, N₀ = 400,000

Population in 144 years = ?

We first need to find the doubling time.

Doubling time period, n = 144 / 48

n = 3

To find the population after a certain period of time, we use the formula

N = N₀ X 2ⁿ

N = 400,000 X 2³

N = 32,00,000

Therefore, the population after 144 years is 32,00,000.