Question
The ratio between the number of books and pencils is 8:5
and the ratio of cost of per book and pencil is 6:5 then find the percentage by which total cost of book is greater than the total cost of pencil.Solution
Number = books: Pencil = 8x : 5x Cost = books: pencil = 6y : 5y Total cost = books: Pencil = 48xy : 25xy Required % = [(48xy-25xy)/25xy] × 100 = 92%
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welding?
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