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| Math Central | Quandaries & Queries |
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Question from Lenton: I have a 48 sq. feet area that I need to cover.& How many cubic ft would I need to cover 48 sq. ft.? |
Hi Lenton,
It looks like you are covering a 48 square foot region with topsoil or something similar. If so how deep is the covering layer?
Penny
Lenton replied:
not deep, the rock will be 3-5 inches black Mexican Rock.
1 foot is 12 inches so 5 inches is $\large \frac{5}{12}$ inches.
The volume of a slab is the area of the base times the height so your slab of rock has a volume of
\[48 \times \frac{5}{12} = 20 \mbox{ cubic feet}\]
if it is 5 inches thick. I'll let you do the calculation if it's 3 inches thick.
Penny
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