10-1/2 cubic yards
10*13*3 = 390 cubic inches.
The question cannot be answered in a sensible way. The size of the hole is given in only two dimensions - in all likelihood, that means the area that the hole covers but not how deep it is. The amount of dirt required to fill the hole will depend on the depth of the hole as well.
None it's a hole
Assuming a rectangular (3-D) shape, multiply the three numbers. The answer will be in cubic feet.
If this is a circular hole, it will take about 151 cubic feet of dirt.
You need 4.44 cubic yard, they tell you to always round up, 4.5 cubic yards is what you need to get to fill this area.
how much sand and other humous is in the dirt ??
You will need 20 cubic yards of dirt, which is 2 loads in a tandem dump truck.
There is NO dirt, it is a hole! If you want to fill it with dirt, that is 4x6x12=288 cubic feet, weighing about 28,800 pounds
None because it's a hole but 6 cubic yards of dirt will fill it up.
A hole does not have dirt!