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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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Answer Posted / aprameya shyam
let length=x... then breadth=(36-x)
since thread is used lengthwise twice & brdthwise once v
can write 4x + 2(36 - x) = 36 cm
bcoz there are 2 lengths n two 2 in a 4 sided figure(dis is
obvious)
solving v get x=-18 (ignore the -ve sign)
hence l = 36-18 = 18 & b = 18
so area=l*b = 18 * 18 = 324sqcm
| Is This Answer Correct ? | 4 Yes | 6 No |
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