Answer:
\large \boxed{\text{2.00 in}}
Step-by-step explanation:
The formula for the volume of a rectangular solid is
V = lwh
[tex]\begin{array}{rcl}V & = & lwh\\187 & = & 8.5 \times 11 \times h\\& = & 93.5h\\h & = &\dfrac{187}{93.5}\\\\& = & \textbf{2.00 in}\\\end{array}\\\text{The ream is $\large \boxed{\textbf{2.00 in}}$ thick.}[/tex]