A square footing of side 4 m is designed to support a square column of 400 mm size. Effective depth of footing is 500 mm. The safe bearing capacity below the footing is 1.5 MPa. The design bending moment for the footing is________
1
7920 KN-m
2
900 KN-m
3
9720 KN-m
4
972 KN-m