Please I need help for the number one question in my mathematics ?

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1 Answer
Apr 5, 2018

63 books where each one is 4 cm wide


Each book is 3cm wide. There is a count of 84 books so the shelf length is #84xx3"cm" = 252"cm#

We change the books to ones that are 4cm thick.

The count of these books is #(252cancel("cm"))/(4cancel("cm"))=63 1/2#

Did you know you can cancel out units of measurment the same way you can numbers?

You can not but #1/2# a book on so we have 63 books