Q$.2$ The from$-$to chart below indicates the number of loads moved per $8-$hr day $($above the

slash$)$ and the distances in ft $($below the slash$)$ between departments in a particular factory.

Fork lift trucks are used to transport the materials. They move at an average speed $-275$

$\frac{f}{m}in($loaded$)$ and $350$ftmmin $($empty$).$ Load handling time $($loading plus unloading$)$ per

delivery is $1\mathrm{.}5$ min $,$ and anticipated traffic factor $-0\mathrm{.}9.$ Availability $=95\%$ and worker

efficiency $-110\%.$ Determine the number of trucks required under each of the following

assumptions:

$($a$)$ the trucks never travel empty

$($b$)$ the trucks travel empty a distance equal to their loaded distance.