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there is no dirt in a hole that has been dug. there is just a hole....

But assuming you mean how much dirt was in the hole:

I am assuming that the whole is circular and the width is the diameter of the whole.

To find the cubic feet of dirt in a hole you need to find the volume. The formula for volume of a cylinder (a 3-D shape with circles at two ends aka a can) is:

V = PI * r^2 * h

V = volume

PI = the constant PI which is about equal to 3.14

r = the radius of the hole or 1/2 the diameter

h = the height of the cylinder, or depth of the hole in this case

Plugging in your numbers and solving for V

V = 3.14 * (7/2) ^2 * 3

V = 115.395 cubic feet

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Q: How many cubic feet of dirt is in a hole dug 7ft wide and 3ft deep?
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