* Anirud brought some books for rupess 60 he
the brought 5 mose books for the same
amount each book would have cos

1 thought on “<br />* Anirud brought some books for rupess 60 he<br />the brought 5 mose books for the same<br />amount each book would have cos”

1. Step-by-step explanation:

   Let the number of books be = x.

   Total cost of the books = Rs. 60.

   ∴ Cost of each book =Rs.x60

   If the number of books is (x + 5), then the cost of each book = Rs. x+560

   Difference in cost is one rupee = Cost of each book when number of books is (x) – Cost of each book when number of books is (x + 5)

   x60−x+560=1

   x(x+5)60(x+5)−60x=1

   x2+5x60x+300−60x=1

   x2+5x=300

   x2+5x−300=0

   x2+20x−15x−300=0

   x(x+20)−15(x+20)=0

   (x+20)(x−15)=0

   x+20=0 or x−15=0

   ∴x=−20 or x=15

   ∴ Number of books = x = 15

   Number of books cannot be negative. Hence, -20 is rejected.

   ∴ Cost of each book =x60=1560

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