2 inches = 1/6 foot
27 cubic feet = 1 cubic yard
Volume of the hole = (15' x 7' x 1/6-ft) = 17.5 cubic feet = 0.648 cubic yard (rounded)
about 432 cubic inches
5,287.7 gallons of water.
.21 yards of sand will fill an area 115 inches by 67 inches to a depth of 2.5 inches.
22/7x6x6x6 cubic inches
None, as a hole which is 6 inches wide and 42 inches long has no depth and thus no volume.
about 432 cubic inches
18.6240 yd³
5,287.7 gallons of water.
To install a mailbox post correctly, dig a hole at least 24 inches deep, place the post in the hole, and fill it with concrete. Make sure the post is level and allow the concrete to set before attaching the mailbox.
42 cubic feet or 1.56 yards.
.21 yards of sand will fill an area 115 inches by 67 inches to a depth of 2.5 inches.
The recommended method for installing a concrete footing for a 6x6 post is to dig a hole that is at least 12 inches in diameter and 24 inches deep. Place a cardboard tube form in the hole and fill it with concrete, making sure it is level. Insert a post anchor into the wet concrete and allow it to cure for at least 24 hours before attaching the post.
22/7x6x6x6 cubic inches
None, as a hole which is 6 inches wide and 42 inches long has no depth and thus no volume.
6,400 ft3
509.7 litres
How deep? 1 inch will take .7 yards