Question

In the first year, the population of a village Increased by 5% and in the next year it decreased by 5%If at the end of the second year, the population was 79,800, what was i at the beginning of the first year​

Answer 1

Answer:

Friction is the force resisting the relative motion of solid surfaces, fluid layers, and material elements sliding against each other.

Step-by-step explanation:

Answer 2

Given,

5% increased in the first year

5% decreased in the second year

final population = 79800

To find,

The amount of initial population.

Solution,

We can simply solve this mathematical problem by using the following mathematical process.

Let, the initial population = x

(Assume x as a variable to do the further mathematical calculations.)

Now, population after first year = x + (x×5/100) = x + x/20 = 21x/20

Population after second year = 21x/20 - (21x/20 × 5/100) =21x/20 - 21x/400 = 420x-21x/400 = 399x/400

According to the data mentioned in the question,

399x/400 = 79800

x = 79800 × 400/399

x = 80000

Hence, the Initial population was 80000