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It depends on the volume of the bag and how deep you want the gravel to be.
You will need 20 cubic yards or 25.7 tons of gravel.
Plan on about 2.2 cubic yards (2.8 tons) of gravel.
92.593 cubic yards for every inch deep.
(2222/9) times (the weight of 1 cubic yard of gravel, in tons)
algorythm
The answer will depend on the depth to which the gravel is to be spread.
It depends on the volume of the bag and how deep you want the gravel to be.
The sub-grade's compacted soil, topped by the sub-base of crushed stone and then the pea gravel.
You will need 20 cubic yards or 25.7 tons of gravel.
You will need 65.93 cubic yards or 84.6 tons of gravel.
Plan on about 2.2 cubic yards (2.8 tons) of gravel.
You can connect a watt meter to the circuit or it can be done by calculation. By calculation use this formula, Watts = Amps x Volts.
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walking, braking
9.26 cubic yards for every inch of depth.
92.593 cubic yards for every inch deep.