Question

The weigh of 72 books is 9kg. What is the weigh of 80 such books? How many such books weigh 6kg

Answer 1

weight of 1 book is 8 kg
weight of 80 books is 80*8 = 640 kg

Answer 2

Answer:

Step-by-step explanation:

Weight of 9 books: 72 kg

Weight of 1 book= 72\9 kg= 8 kg

Weight of 80 books= 8* 80kg= 640kg

Weight of 6 books= 8/6kg= 4/3kg or 1.33 kg

(1.333... is irrational or non terminating)