Please wait...
1800-212-7858 (Toll Free)
9:00am - 8:00pm IST all days

or

Thanks, You will receive a call shortly.
Customer Support

You are very important to us

For any content/service related issues please contact on this toll free number

022-62211530

Mon to Sat - 11 AM to 8 PM

Please answer this

Asked by 7th October 2009, 11:55 PM
Answered by Expert
Answer:

Let the price of 1 book be x.

Let the persons buys n number of books in Rs.300

When the price of the book is reduced by Rs5, new price of the book x' = x -5

The person can buy n+3 books.

Now according to the first condition,

nx = 300

According to the second condition,

(n+3)(x-5) = 300

((300/x)+3) (x-5) = 300

(300+3x)(x-5) = 300x

3x2 -15x - 1500 = 0

x2 -5x - 500 = 0

(x - 25) (x+20) = 0

x = 25 or x = -20

Since the price can never be negative so the original cost of the book is Rs 25.

 

Answered by Expert 8th October 2009, 10:52 AM
Rate this answer
  • 1
  • 2
  • 3
  • 4
  • 5
  • 6
  • 7
  • 8
  • 9
  • 10

You have rated this answer /10

Your answer has been posted successfully!