To find the height of a pile of 25 books, we first need to determine the thickness of each book in a consistent unit, preferably in centimeters or meters.
The thickness of each book is given as 3 cm and 5 mm. To convert everything into centimeters:
- 1 cm = 10 mm, so 5 mm = 0.5 cm.
Therefore, the thickness of each book is:
3 cm + 0.5 cm = 3.5 cm.
Next, we need to calculate the total height of 25 books:
Total height = Thickness of one book x Number of books = 3.5 cm x 25
Now performing the multiplication:
Total height = 87.5 cm.
Now we need to convert the height from centimeters to meters:
- 1 meter = 100 cm, hence:
Height in meters = Total height in cm / 100 = 87.5 cm / 100 = 0.875 m.
In conclusion, the height of the pile of 25 books is 0.875 meters.