Posted by **Amy** on Tuesday, March 27, 2012 at 9:32pm.

Complete in Metric Conversions:

A lawn sprinkler covers a rectangular pattern of 20ft x 30ft. if the flow rate of the sprinkler is 2.5 gpm, derive a formula for calculating the time (hours) to apply D inches of water over one 20ft x 30ft area. What are the units on the constant?