SOLUTION: if one dictionary is 20 mm thick then how many we need more dictionaries to make 40 cm high pile?

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Question 759770: if one dictionary is 20 mm thick then how many we need more dictionaries to make 40 cm high pile?
Answer by Cromlix(4381) About Me  (Show Source):
You can put this solution on YOUR website!
Convert millimetres to centimetres
1 millimetre = 0.1 centimetre
Therefore 20 millimetres = 2 centimetres
Divide 40 by 2 = 20 dictionaries.
As you already have one, you need a
further 19 dictionaries.
Hope this helps.
:-)