the weight of 772 books is 9 kg
a)what is the weight of 880 such books
b) how many such books weight 6 kg
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(a) weight of 772 books=9kg
weight of 1 book = 9/772
weight of 880 books= 9/772×880= 10.25 kg
(b) no. of books weight 9kg = 772
no. of books weight 1kg =772/9
no. of books weight 6 kg = 772/9×6 = 514 books
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