7.
The weight of 72 books is 9 kg.
How many books will weigh 6 kg?
Answers
Answer:
48kg
Step-by-step explanation:
Unitary method
1) Find weight of each book
72/9= each book weighs 8kg
2) Weight of 6 books will be 8*6
=48kg
Or
Cross multiplication
weight number of books
9kg 72
6kg x
that implies,
9*x= 6*72
9x=432
x (i.e. weight of 6 books) = 48
Answer:
48 books.
Step-by-step explanation:
Weight of 72 books = 9kg
Weight of 1 book = 72/9 = 8kg
Therefore, no. of books that will weigh 6kg = 8×6 = 48 books.
You can also solve it in this way
The thing which we have to find ,we write it on right hand side. As we have to find out the number of books...so we write it on right hand side.
9kg is the weight of 72 books.
Then weight of one book is 72/9 =8kg
So, One book weighs 8kg.
therefore, 6kg is the weight of = 8×6 books =48books