A 230 mm brick masonry wall is to be provided with a reinforced concrete footing onsite having soil with safe bearing capacity of 125 kN/m2, unit weight of 17.5 kN/m3 and angle of shearing resistance of 30°. The depth of footing will be nearly
1
0.8 m
2
0.7 m
3
0.6 m
4
0.5 m