Question

a shopkeeper buys some books for rupees 80. if he had bought 4 more books for the same amount each book would have cost rupees 1 . find the number of the books a bought

Answer 1

Answer:

Step-by-step explanation:

Let the number of books purchased for Rs.80 = x

Then cost of each books = 80/x

If he buys for more books, the number of books = x+4

Cost of each book = 80/x+4

(80/x)-[80/(x+4)]=1

Solve x=-20 and x = 16

Rejecting x = -20

The number of books purchased = 16