Question

if cost price of 25 books is equal to selling price of 30 books

Answer 1

what to find bro please tell

Answer 2

Step-by-step explanation:

Hey there!

CP of 25 books = SP of 20 books

 

Let CP of 1 book be x

     CP of 25 books = 25x

A/q,

      SP of 20 books = 25x

      SP of 1 books = 25x/20

∵ SP > CP , it is profit.

Profit = SP - CP

        = (25x/20) - x

        = 25x - 20x / 20 

        = 5x / 20  =x/4

Profit % = Profit *100

                 CP

 = x/4  * 100

    x

=       x    *100

      x*4  

= 25x / x

= 25 %

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