A two-hour duration storm event with uniform excess rainfall of $3\:cm$ occurred on a watershed. The ordinates of streamflow hydrograph resulting from this event are given in the table.

$\begin{array}{|c|c|} \hline \text{Time (hours)} & 0 & 1 & 2 & 3 & 4 & 5 & 6 & 7 \\ \hline \text{Streamflow} (m^{3} /s) & 10 & 16 & 34 & 40 & 31 & 25 & 16 & 10 \\ \hline \end{array}$

Considering a constant baseflow of $10\:m^{3}/s$, the peak flow ordinate (in $m^{3}/s$) of one-hour unit hydrograph for the watershed is _________________. (in integer)