$($c$)$ An RC beam $300mm$ wide and $700mm$ deep overall, is reinforced with $20mm$ and $3$ bars. The centres of the bars are $50mm$ from the underside of the beam. The maximum stresses are not to exceed $7\frac{N}{m}{m}^2$ for concrete and $190\frac{N}{m}{m}^2$ for steel. Find the moment of resistance and the safely distributed load, the beam can carry. The span is $6m$ and the weight of concrete is $25k\frac{n}{m^3}.$

$8$