The cylinder in the figure is to be placed in fresh water. The top potion of the cylinder is foam with specific weight of 0.785 kN/m3. What is the needed specific weight of the cylinder which is attached to the foam for it to be neutrally buoyant and on an upright position when submerged in the said liquid?

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Storm Sewers and Detention

The storm drains system transports rainwater or stormwater and other runoff from roads, parking lots, and roof downpipes directly to nearby creeks, rivers, or the sea without any treatment.