Q$2)$ To determine the gradient between two$-$point P and Q a tachometer was set up at a R station and the following observation where taken keeping the staff held vertical, if the horizontal angle PRQ is $36{20}^{\text{'}}$ determine the avg. Gradient between P and Q Point take K $=100$ and Elevation of $HI=100m$

$(5m)$

$\backslash$table$[[$Staff$,$V$.$ Angle,Staff Reading$],[$Sta$.,$S$,$Middle $($R$.$R$)],[P,+4{40}^{\text{'}},0\mathrm{.}600,1\mathrm{.}510],[Q,-040,0\mathrm{.}620,1\mathrm{.}310]]$