1.A singly reinforced concrete beam has b=24in, d=12in and it is reinforced with 6#9 bars. If f'c=4ksi and fy=60ksi, determine the beam capacity, Mu = fMn.
2.A flat broad-crested regular step dam with a drop of 2 m is situated on a grossly polluted stretch of river below a sewage outfall plant. The river is located at an elevation of 2 km. Determine the oxygen concentration below the dam if the water upstream has a concentration of 2g/L and a temperature of 26 degrees Celsius.