1. the answer is 5.28 cubic yards. 18' is 6 yards, 24' is 8 yards, and 4" is 0.1 repeating yards. 6x8x0.11=5.28.
2. The answer is 74.14 cubic yards. 60' is 20 yards, 80' is 26.67 yards, and 5" is 0.139 yards. 20x26.67x0.139=74.14.
