# Find in metre the height of a pile of 25 books if each book is 3cm 5mm thick.

Centimeters , Millimeters and Meters are measuring units used to measure lengths ,heights and distances.

## Answer: Height of 25 piles of books is 0.875 m with each book of thickness equal to 3cm 5mm

We will be using the conversion of units to find the height in meters

**Explanation: **

We know that,

1cm = 10mm

Hence, 3cm = 30mm

Now, the thickness of one book is 3 cm 5 mm

3 cm 5 mm = 30 mm + 5 mm = 35 mm

Thus, the height of a pile of 25 books is = 25 × thickness of one book

= 25 × 35 = 875 mm

We know that,

1 mm = 0.001 m

Hence, 875 mm = 875 × 0.001m = 0.875 m