Determine the maximum load for a simply supported beam of $50$ ?mm diameter and $600$mm span, centrally loaded, as the load cyclically varies from W to $3$W$.\backslash$sigma en $=350$ ?MPa, $\backslash$sigma yp$=525$ ?MPa and $\backslash$sigma u $=700$ ?MPa. Design factor of safety is $1\mathrm{.}3.$

600 W to 3W