Problem:
The Existing surface elevation at station 2+0 is 122.30 the existing surface elevation station 3+50 is 120.50. You need to place a pipe at station 2+0 at an invert elevation of 110.00. The pipe extends straight to station 3+50 at a gradient of -.01.
Required:
Question: Assuming side slopes of 1 to 1 what is the amount of dirt that will be excavated from the trench?
Note: Show supporting computations in good form.