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Yards are for measuring length not volume.

Cubic yards required will be as follows:

1 cubic yard = 3 feet x 3 feet x 3 feet = 27 cubic feet

Your concrete pad is 30ft x 40ft x 0.3333ft (4 inches assumed) = 400 cubic feet

400 divided by 27 = 14.8148 cubic yards required

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Wiki User

14y ago

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15 YARDS

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Anonymous

4y ago
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Q: How many yards of concrete for 30'x40'x4 pad?
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