<PRE><B>Question 930099</B>
The questions force you to first look for unit conversions.


1 acre = 66 feet by 660 feet = 43560 square feet


1 inch of rain water over 1 acre implies that first 1 inch is for height over the acre.



{{{(1/12)foot*43560*foot*foot=3630}}} CUBIC FEET.



{{{(1)inches(43560)12(inches/foot)(12(inches/foot))}}}
{{{43560*144*cubicInches}}}
{{{6272640*cubicInches}}}</PRE>