A reinforced concrete beam having the cross section shown is on a simple span of 28ft. It carries uniform service loads of 3.60 kips/ft live load and 2.20 kips/ft dead load. Check the adequacy of the beam with respect to the moment. Use f1c= 3000 psi and fy=40,000psi.
a) Reinforcing is six No. 10 bars
b) Reinforcing is six No. 11 bars
cross section is 20X45" 20" width 42" from top down to reinforcing bars and 3" from bottom up to reinforcing bars