Question 618425
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Hi,
A two volume set of math books is on a shelf in the usual manner, the books sit upright and are side by side.  
The total thickness of each volume is 2 inches and the thickness of each cover is 1/8 inch.
distance between the first page of Volume I and the last page of Volume II?
 2" + 2(1/8)" + 2" =  2" + 1/4" + 2" = 4.25"