Question

The weight of 72 books is 9kg. a. Find the weight of 80 such books.​

Answer 1

let the kg be x

72/9=80/x

72*x=720

x=720/72

=10 kg

i hope i helped

Answer 2

Weight of 72 books = 9kg

Weight of 1 book =

9/72 = 1/8

Weight of 80 such books

80 X 1/8 = 10

So, weight of 80 such books is 10 kg