Question

The weight of 72 books is 9 kg. What is the weight of 40 such books?-

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Answer 1

Answer:

Weight of 72 books =9 kg

Therefore weight of 1 book is 72/9=8kg

1 book=8kg

So 40 books=40×8=320 kg

Step-by-step explanation:

Answer 2

Answer: 5 kg

Step-by-step explanation:

Weight of 72 books = 9 kg

Weight of 1 book = 9 ÷ 72

                              = $\frac{1}{8}$

Weight of 40 books = $\frac{1}{8}$ x 40

                                  = 5 kg

Hope this helps.

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