Just need $71$

Figure P$3-70$ shows a tapered flat bar that has a uniform thickness of $20$ mm $.$ The depth tapers from $h_1=40mm$ near the load to $h_2=20mm$ at each support. Compute the stress due to bending in the bar at points spaced $40$ mm apart from the support to the load, Let the load $P=5\mathrm{.}0kN.$

For the flat bar shown in Figure P$3-70,$ compute the stress in the middle of the bar if a hole of $25$ mm diameter is drilled directly under the load on the horizontal centerline. The load is $P=5\mathrm{.}0kN.$ See data in Problem $70.$

FIGURE P$3-70$ Tapered flat bar for Problems $70$ and $71$