A square footing 2 m is built in a homogeneous bed of non-cohesive soil of density 2 tonnes/m3 and has an angle of shearing of 38∘ . The depth of the base of footing is 1 m below the surface. Calculate the safe load in tons that can be carried by the footing with a factor of safety of 3 against complete failure . Adopt Terzaghi's bearing capacity factors Nq = 47 andNγ = 64.