Problem: The volume of water used for crop irrigation is measured in acre-feet, where 1 acre-foot is the amount of water needed to cover 1 acre of land to a depth of 1 ft.How many acre-feet are in Lake Erie (total volume=116mi3)?

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We’re being asked to determine the volume of Lake Erie in acre-feet which have a total volume=116mi3.


To do so, we need the following conversion factor:

1 mi = 5280 ft
1 acre = 43560 ft2


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Problem Details

The volume of water used for crop irrigation is measured in acre-feet, where 1 acre-foot is the amount of water needed to cover 1 acre of land to a depth of 1 ft.

How many acre-feet are in Lake Erie (total volume=116mi3)?

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Our tutors have indicated that to solve this problem you will need to apply the Dimensional Analysis concept. You can view video lessons to learn Dimensional Analysis. Or if you need more Dimensional Analysis practice, you can also practice Dimensional Analysis practice problems.