Question

The weight of 72 books is 9 kg.
Find the weight of 80 such books.
(b) How
many books will weigh 6 kg?​

Answer 1

Answer:

$weight \: of \: 72 \: books \: is \: 9kg \\ so \: 80kg = 10 \: books \\ \\ weight \: of \: 6kg = 54books$

Answer 2

Weight of 72 books = 9kg

Weight of 1 book = 9/72

= 1/8

= 0.125kg

= 125 grams

(a) Weight of 80 books = 80×125

= 10000 grams

= 10 kg.

(b) No. of books that weight 6 kg = 6/0.125

= 48 books

Hope this helps....:)