Question #$1$:

A grader will be used to maintain $13,200$

$ft$ of haul road. It is estimated that this

work will require light scarifying two

passes in first gear and leveling the road

requires two passes in second gear. Use

an efficiency factor of $60\%.$ Grader

speeds in first gear as $4\mathrm{.}4mph$ and in

second gear as $6\mathrm{.}4mph.$ Estimate the

time for this operation.

$0\mathrm{.}752hrs$

$9\mathrm{.}37hrs$

$3\mathrm{.}195$ hrs

$8\mathrm{.}201hrs$