Question

The profit earned by a book seller by selling a book at a profit of 5% is Rs 15 more than when he sells it at a loss of 5%.Find the cost price of the book​

Answer 1

Answer:

Step-by-step explanation:

let Cost price of the book is 'x'

so. selling price of book at 5%profit = (x+5x)/100 = (100x+5x)/100 = 105x/100

      selling price of book at 5%loss = (x-5x)/100 = (100x-5x)/100 = 95x/100

equate both

       105x/100 = 95x/100 = 15

       10x/100 = 15

        10x = 1500

            x = 1500/10

            x = 150

the seling price of book if Rs. 150