#### Question

On the construction work of a flyover bridge there were 320 workers initially. The number of workers were increased by 25% every year. Find the number of workers after 2 years.

#### Solution

Here, P = Number of workers initially = 320

A = Number of workers after 2 years

R = Rate of increase of number of workers per year = 25 %

N = 2 years

A = P `(1 + "R"/100)^"N"`

= 320 `(1 + 25/100)^2`

= 320 `(1 + 1/4)^2`

= 320 `(5/4) ^2`

= 500

Hence, the number of workers after 2 years is 500.

Is there an error in this question or solution?

Solution On the Construction Work of a Flyover Bridge There Were 320 Workers Initially. the Number of Workers Were Increased by 25% Every Year Concept: Application of Formula for Compound Interest.