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if a 36 cm thread is used to wrap a book , lengthwise twice and breadthwise once, what is the size of the book?

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if a 36 cm thread is used to wrap a book , lengthwise twice and breadthwise once, what is the size of the book?
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2 Answers

  1. length of the book = x
    width of a book = y
    4x + 2y = 36
    (one wrap covers both side length of the book same in width
    also – so two wrap covers 4x as well as in 2y)
    4(6)+ 2(6)=36
    4(7)+2(4) =36
    4(8)+2(2)=36
    are the possible roots…. second shud be the answer
    because that parameters are ideal for a book.
    7 x 4 is the size of book

  2. @ Aprameya Shyam
    length=x does not imply breadth=36-x
    2x+4y=36.
    3 possible answers are
    (2,8) -> 16sqcm.
    (4,7) -> 28sqcm.
    (6,6) -> 36sqcm