Question

A shopkeeper buy 8locks for rs.34, and he sold 12locks for rs 57rs, then for gaining 900rs how many locks he need to sell?

Answer 1

Step-by-step explanation:

first first find the cost price of 12 locks you will get 51 so you again will be 6 rupeesthen you have to divide the 12 from it you will get 50 paise you convert it into rupees 0.5 then divide it from 900 you will get1800 locks