Provided it's not a short tandem, 15 yards with a 'rock tub' dump body and 16 yards with a 'dirt tub' dump body are typical.
17 tons
It depends on the size of the dump trucks, but assuming a standard dump truck can hold about 10-15 cubic yards of dirt, it would take approximately 260,000 to 390,000 dump trucks to move 3.9 million cubic yards of dirt.
16
20
Your dump truck will hold approximately 176 cubic yards. This can be calculated by multiplying the dimensions together (16 x 5.5 x 8 = 704) and then converting the result from cubic inches to cubic yards (704 / 46,656 = 0.0151).
16 yards is standard 20 yards for a 12 wheeler
The size of dump trucks can vary greatly, with the smallest dump trucks containing about 3 yards of material. Coal mine dump trucks, on the other hand, may contain up to 100 yards.
15.2911
25 - 30.
25-28
Roughly 6 yards - typically half the weight rating of a tandem axle truck - of course this will depend on the type of material you're hauling. Wet saturated materials and coarse rock will be less volumetrically than sand, organic soil etc.