A contractor needs to stockpile 650 CY of gravel at a site. The gravel has an angle of repose of 35.

1. If the gravel is stored in conical piles 8 ft tall, how wide is the base of each conical pile and how many conical piles are required?
2. If the gravel is stored in a triangular bank that is 15 ft wide at the base, how tall and long is the spoil bank.

Looking for some assistance as I am unsure how to properly complete without having a Load Factor as well. normally it would be the Bank Volume/Load Factor?