Please help!

Module $9$ Homework

TCM $3332$ Online

Facts: A contractor plans to finish grade a haul road for a new research facility construction. Based on the following information, answer the questions below:

The haul road area to be graded is $690,000y{d}^2$

The contractor plans to use a CAT motor grader with a $12$ ft wide blade and $9\mathrm{.}5$ ft effective width

The travel speed of the grader is $3\mathrm{.}2$ mph on average

The grading job requires $2$ passes to a smooth surface

Assume that the work efficiency is $50mi\frac{n}{?}$ hour or $0\mathrm{.}83($Ensure you use the right efficiency factor between the two for the unit to be consistent$)$

Question $1$: Estimate the productivity per hour $($sq$.$yd$./$hr$)$ for the grading job $($show your work$).$

Question $2$: Estimate the total time in hour for completing the grading job $($show your work.$)$