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If the price eof the book Is reduced by 2, a boy can buy 2 books more with the amount he has. But if the price is increased by 3 he could buy 2 books less with the same amount. Find the actual price of the book and the amount he has |
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Answer» Given : price of the book Is REDUCED by 2, a boy can buy 2 books more with the amount he has. But if the price is INCREASED by 3 he could buy 2 books less with the same amount. To FIND : the actual price of the book and the amount he has Solution: Let say Cost of Book = C Number of bbok he can buy = B Amount he had = BC (C - 2) (B + 2) = BC => BC +2C - 2B - 4 = BC => C = B + 2 (C + 3) ( B - 2) = BC => BC +3B - 2C - 6 = BC => 2C = 3B - 6 => 2(B + 2) = 3B - 6 => 2B + 4 = 3B - 6 => B = 10 C = 10 + 2 = 12 BC = 120 Actual price of the book = 12 Amount he had = 120 Learn more: by INCREASING the list of a book by rupees 10 a person can buy 10 ... the cost of some books is rupees 60. cost of every book is the same ... |
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