Question

8. The weight of 72 books is 9 kg. What is the weight of 40 such books?
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Answer 1

Answer:

5 kg

Step-by-step explanation:

Applying unitary method

72 books ---> 9 kg

1 book --> y kg

y= 9/72=1/8 kg

40 books --> x kg

x= 40 * 1/8 =  5 kg

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