Question

9 A bookshelf will hold 360 books of thickness 2 cm. How many copies of National Geographic magazine will it hold if each copy is 6 mm thick?

​

Answer 1

1200

Explanation:

The bookshelf can hold 360 books with thickness 2cm, which is equal to 20 mm. Therefore the total space in mm that can be fit into the bookshelf is 360 * 20 = 7200 mm. To find the amount of books with thickness of 6 mm we can fit, we must divide 7200 by 6. The result is 1200

Answer 2

1200 copies of National Geographic magazine will it hold if each copy is 6 mm thick.

Explanation:

1 cm = 10 mm

2 cm = 20 mm

if 2 cm holds 360 books

we can also say 20 mm holds 360 books

basic equation thus can be formed:

( 20/6 ) * 360

1200 copies