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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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

@ 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