Problem $-4$

The power source in an arc welding operation on titanium generates $100Bt\frac{u}{m}in,$ which is transferred to the work surface with heat transfer factor $=0\mathrm{.}85$ and melting factor $=0\mathrm{.}6.$ A continuous fillet weld is to be made with a cross$-$sectional area $=0\mathrm{.}05i{n}^2.$ Determine the travel speed at which the welding operation can be accomplished.