Excavation for a 500 feet by 1000 feet area requires the uniform removal of 6″ top soil. A single rubber tire scraper with a heaped capacity of 100 cubic yards per hour will be used. The soil has an excavation expansion facto r of 25%. How many hours should be estimated for the excavation?

Excavation for a 500 feet by 1000 feet area requires the uniform removal of 6″ top soil. A single rubber tire scraper with a heaped capacity of 100 cubic yards per hour will be used. The soil has an excavation expansion facto r of 25%. How many hours should be estimated for the excavation?