Problem Statement: An excavator has a bucket capacity of 1.5 cubic meters ($m^3$). The average cycle time (load, swing, dump, return) is 30 seconds. The job efficiency is 50 minutes per hour. What is the production rate in $m^3/hr$?

Problem Statement: A bulldozer is pushing material an average distance of 50 meters. The dozer pushes at 3 km/hr and returns at 5 km/hr. Loading takes 0.2 minutes, and dumping takes 0.1 minutes. Its blade capacity is 3 $m^3$, and job efficiency is 45 min/hr. Calculate the production rate.

Problem Statement: An excavator loads 150 $m^3$/hr. Dump trucks are used to haul the material away. Each truck has a capacity of 15 $m^3$. The round-trip travel time for a truck (including spotting and dumping, but excluding loading) is 24 minutes. How many trucks are needed to keep the excavator busy 100% of the time without a queue?

Problem Statement: A contractor purchases a wheel loader for \$150,000. It has an expected useful life of 5 years (or 10,000 hours total). At the end of 5 years, the estimated salvage value is \\$30,000. Calculate the annual depreciation and the hourly depreciation charge.