in a school library the ratio of general knowledge books to mathematics books is same as the ratio of mathematics books to Physics book if there are 150 books of general knowledge and 300 books of mathematics find the number of Physics books
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300 is no of books in library
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Answer:
GK:Maths=Maths:physics
simply we use formula
product of means= product of extreme
150×300=300×x
150×300 ÷300=. x
600=x
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