How much dirt is in a hole that is 6m deep and 3m in diameter?

Answer 1

Remember that Answers.com does not exist to do your homework for you. If, however, you need the answer for yourself (say, while digging said hole), here is how you would go about figuring it out.

Some starting notes:

• Let us assume your hole is cylindrical (has a circular opening).
• A diameter of 3m is a radius of 1.5 m.
• By 'how much dirt' I am going to assume you mean volume-wise. If you know the density of the dirt you can figure out the mass.
• Volume for a cylindrical hole is area of the hole opening times the depth.
• Area of a circle is pi*(radius2).

So, we square 1.5 meters to get 2.25 square meters, and multiply that by pi to get a little more than 6.75 square meters. This is the area of the hole opening. Multiply that by the depth of 6 meters and you get 40.5 cubic meters of dirt. Once you dig it up the volume may be larger than this because the process of digging 'fluffed up' the soil with air. To give you a sense of how much 40 m3 of dirt is, the internal volume of a school bus is 35 cubic meters according to a quick Google search.