Question

A man buys Some books for ® 8000. If he had bought 4 more books for same amount each would have Cost ® 100 less. Find the number of books​

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

Answer 2

Cost of books=₹8000. No of books =4. =8000entu4. Sorry guys I don’t have enough symbol