Question

publisher sells a book for rupees 168 at a profit of 20% if his cost of production increases by 30% what should be increase in price of the book so that his percentage of profit remains the same

Answer 1

He got profit 20% = 33.6 rupees 168minus 33.6=135.6
By increased 30%= 50.6 will increase
total value of production = 135.6+50.6=186.2 rupees
So 20% of 186=37.25 :he should sell in total= cost of production + 20% profit to get profit
= 186+37.25=223.25 rupees