Problem Solved: Grit Removal Rate Problem - Wastewater Math

This question comes from the California Wastewater grade 2 certification exam sample questions that can be found here: http://www.swrcb.ca.gov/water_issues/... The problem reads: At a wastewater treatment plant which receives a flow rate of 650,000 gallons per day, a total of 50 cubic feet of grit was removed for the month. Calculate the rate of grit removal assuming 30 days in a month. a. 1.1 cu.ft./MG. b. 1.3 cu.ft./MG. c. 1.7 cu.ft./MG. d. 2.0 cu.ft./MG. e. 2.6 cu.ft./MG. http://americanwatercollege.org