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16-02-2018
Mathematics

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The weight of 72 books is 9 kg.what is the weight of 80 such books? How many such books would weigh 6kg?

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vlandjova vlandjova

16-02-2018

9 divided by 72 = 0.125
0.125 is the weight of one book
0.125 times 80 = 10kg.
So 80 books weight 10kg.
72 divided by 9 = 8 books make up 1 kg.
8 times 6 =48

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