Question

A store keeper sells a book at 15% gain had he sold it for 18 more he would have gained 18% find the cost price of the book

Answer 1

Let the cp of book be x

P1=15/100*x=3x/20

P2=18/100*x=9x/50

A/Q,

P2-P1=18

9x/50-3x/20=18

18x/100-15x/100=18

3x/100=18

x=18*100/3=600

So,cp=rs.600

Answer 2

Answer:

Step-by-step explanation: