There are two stacks of same height located in an industrial area. One of them is of brick kiln using biomass as fuel and another is of metal smeiter using coal as fuel. The stack tip diameter of both the stack was $1\mathrm{.}0m.$ The temperatures were $60C$ and $300C$ of the flue gases emitted from brick kiln and smelter respectlvely. Consider atmospheric temperature and pressure as $20C$ and $95kP$ a respectively. Assume, tlue gas velocities were proportional to the flue gas temperature, Determine the ratio of plume rise at top of smeiter' s stack and brick kiln" s stack using Oak Ridge formula. $[$Round off answer to one decimal place$]$

$H=\frac{v_s{d}_s}{u_t}[1\mathrm{.}5+2\mathrm{.}68{10}^{-2}(P)(\frac{T_s-T_a}{T_t})d_s]$

Answer: