If a field is 120 feet long and 60 feet wide, and you apply at a dosage of one gallon per square yard, how many gallons are required?

• A. 700 gallons
• B. 800 gallons
• C. 900 gallons
• D. 1000 gallons

Answer: (B)

Converting the field size to the correct square-unit is the key. The field is 120 ft by 60 ft, which is 7,200 square feet total. Since the dosage is one gallon per square yard, translate to square yards: 1 square yard = 9 square feet, so 7,200 ÷ 9 = 800 square yards. At one gallon per square yard, you need 800 gallons. (Alternatively, convert dimensions to yards first: 120 ft = 40 yd and 60 ft = 20 yd, area = 40×20 = 800 yd^2, then 800 gallons.)