Physics 221
posted by James .
Hydraulic engineers in the United States often use, as a unit of volume of water, the acrefoot, defined as the volume of water that will cover 1 acre of land to depth of 1 ft.(feet) A severe thunderstorm dumped 2.0in. (inches) of rain in 30 minutes on a town of area 26 km2 (squared). What volume of water, in acrefeet, fell on the town?

Put this in your Google search window:
1/6 ft*26km^2 in acre feet
Now, work it out to make certain you can get the same answer. 
.1666