# Using the scenario provided calculate how many trucks would you need to complete this excavation? How many hours will the excavator be operating for?

Excavation and Backfill BONUS Activity 4(%)

Given the following quantities, complete a cost estimate for the following excavation and backfill project:

Excavation Total 197 cubic yards

Backfill Total 70 cubic yards

Based on the number of cubic yards of material provided, answer the following questions:

An excavator takes ten minutes to load a truck with 12 cubic yards of material.

How many truck loads of material is there?

A truck takes 50 minutes to go and dump the load and return for another load. How many trucks would you need to complete this excavation? (Remember you cannot have ½ a truck, it’s either present or not).

How many hours will the excavator be operating for?

Building on your previous questions, a grade-person will need to be checking the excavation depth as the excavator operator is digging.

How many hours will you need to have this person on-site for?