SSC (English Medium) Class 8Maharashtra State Board
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On the Construction Work of a Flyover Bridge There Were 320 Workers Initially. the Number of Workers Were Increased by 25% Every Year - SSC (English Medium) Class 8 - Mathematics

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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?

APPEARS IN

 Balbharati Solution for Balbharati Class 8 Mathematics (2019 to Current)
Chapter 14: Compound interest
Practice Set 14.2 | Q: 1 | Page no. 93
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.
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