Question

the weight of 72 books is 9 kg what is the weight of 40 such books​

Answer 1

Step-by-step explanation:

weight of 72 books=9kg

weight of 1 book=

$\frac{9}{72}$

which is equal to

$\frac{1}{8}$

weight of 40 books=

$\frac{1}{8} \times 40$

=5kg

therefore weight of 40 books is 5kg

hope it helps

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Answer 2

Answer:

weight of 72 books =9kg

weight of 1 book = 9000 ÷72

=125 grams

weight of 40 books =125 g ×40

=5000 grams or 5 kg