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 Question from JUDY: IF MY HUSBAND HAS A JOB THAT REQUIRES HIM TO MOVE 50,000 CUBIC YARDS OF DIRT, HOW MUCH LAND WOULD THAT COVER AT 1 FOOT DEPTH.

Judy,

The volume of dirt in cubic yards is the surface area covered times the depth in yards. Your depth is 1 foot or $\frac{1}{3}$ of a yard so

$50,000 \mbox{ cubic yards } = \mbox{ surface area } \times \frac13.$

Thus the surface area he can cover is $50,000 \times 3 = 150,000$ square yards. That's approximately 31 acres.

Penny

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