A rectangular field measures 50 yards by 100 yards. If it takes one quart of fertilizer to fertilize a 15-foot-by-30 foot section, how many GALLONS of fertilizer will be needed to fertilize the entire fields?
(1 gallon = 4 quarts; 1 yard = 3 feet)
area = 50x100 or 5000 square yards
= 45000 square feet
number of quarts needed = 45000/(15x30) = 100 quarts
number of gallons = 100/4 = 25
(tell your teacher to go metric, it is sooooo much easier)