Question

Geeta bought some books for rs 80 if she could get one more book for the same amount the difference in the price of each book would have been rs 4 find the price of each book and number of note books she bought​

Answer 1

Answer:

Let the shopkeeper buy x number of books.

According to the given condition cost of x books =Rs80

Therefore cost of each book =

x

80

Again when he had brought 4 more books

Then total books in this case =x+4

So cost of each book in this case =

x+4

80

According to Question,

x

80

−

x+4

80

=1

x(x+4)

80(x+4)−80x

=1

x

2

+20x−16x−320=0

(x−16)(x+20)=0

x=16orx=−20

Hence the shopkeeper brought 16 books