Questions $9-15$ use thefollowing General Problem Statement and figure:

General Problem Statement:

A beam consists of three planks connected by bolts as shown. The bolts are $15-mm$ in diameter and have a spacing $($ s $)$ of $120$ mm along the longitudinal axis of the beam.

The internal vertical shear force is $2\mathrm{.}50$kN

Question $10$:

For the cross section shown, determine the second moment of inertia, $I_{}($###${10}^{-6}{m}^4).$

Place only the number $($###$)$ in the answer blank.