Question

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

Answer 1

Step-by-step explanation:

divide 72 by 9

--›72\9=8

it means that the weight of 8 books is 1kg , npw multiply 1 to 10 to get the weight of 80 books.

--›1*10=10kg

the weight of 80 books wiil be 10kg.

now multiply 8 to 6 to get no. of books which will weigh 6kg.

--›8*6=48

therefore,there will be 48 books

Answer 2

Answer:

a. 10 kg

b. 48 books

Step-by-step explanation:

a.

weight of 72 books=9kg

then number of books per kg = 72/9=8 books

weight of 1 book = 9/72kg

then weight of 80 books = weight of one book * 80 books

=(9/72)*80= 10kg

b.

for 1 kg the number of books are (72/9)=8 books

then for six kg

=8*6=48

=48 books