the weight of 72 books is 9kg.

a-find the weight of 80such books.

b-how many books will weight 6kg ?

Weight of 72 books = 9 kg = 9000 gm

Weight of 1 book = 9000/72 = 125 gm

Weight of 80 books = 80 × 125 gm = 10000 gm = 10 Kg.

Hence, the answer.

  • 5

a. Weight of 72 books = 9kg

Weight of 1 book = 72/9 = 8g

Weight of 80 book = 80 * 8 = 640 kg

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