Question

4) The weight of 144 books is 9 kg.
a) what is the weight of 70such books
b) How many books weigh 5 kg?
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Answer 1

if the weight of 144 books is 9 then weight of one book is 144/9=19

therefore a) 19×70= 1330

b part I don't no

Answer 2

Step-by-step explanation:

since 144 books weigh 9kg ..

1 book will weigh 9/144 kg.

70 books = 9/144×70= 4.375 kg

b)1 kg of books will contain 144/9 books=16

5kg of books=144/9×5=80 books