Question

17. A publisher sells a book for 168 at a profit of 20%. If his cost of production increases by 30%, what should
be the increase in the price of the book so that his percentage profit remains the same?
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Answer 1

Answer:

let the original price = x

so selling price = 20% of x + x = 168

which gives x = 140

Now this increases by 30%

New production cost = 1.3(140) = 182

profit of 20% => the selling price = 1.2(182) = 218.40

so the increase in price = 218.40-168 = Rs 50.4

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