The weight of 72 books is 9kg. (a) find the weight of 160 such books. (b) how many books will weigh 6 kg ?
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1)The total weight of 72 books is 9kgs.
1 book weigh 9/72kgs
Therefore 160 books will weigh 9/72*160= 20kgs
2) The total weight of 72 books is 9kgs
therefore the number of books that would weigh 6kgs would be 72/9*6= 48 books
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