A herbicide broadcast rate is 0.67 ounces per 1,000 square feet. Your hose reel sprayer has a 225 gallon tank and is calibrated to apply 2 gallons per 1,000 square feet. How much herbicide and total spray mix are needed to treat 5,600 square feet?

A herbicide broadcast rate is 0.67 ounces per 1,000 square feet. Your hose reel sprayer has a 225 gallon tank and is calibrated to apply 2 gallons per 1,000 square feet. How much herbicide and total spray mix are needed to treat 5,600 square feet?

• A. 11.2 gallons spray mix and 3.75 ounces herbicide
• B. 11.4 gallons spray mix and 7.50 ounces herbicide
• C. 7.5 gallons spray mix and 4.35 ounces herbicide
• D. 12.0 gallons spray mix and 2.50 ounces herbicide

Answer: (A)

The rates are given per 1,000 square feet, so scale by the area in thousands. For 5,600 square feet, the factor is 5.6. Spray mix needed: 2 gallons per 1,000 × 5.6 = 11.2 gallons. Herbicide needed: 0.67 ounces per 1,000 × 5.6 = 3.752 ounces, about 3.75 ounces. So, treat 5,600 square feet with about 11.2 gallons of spray mix containing roughly 3.75 ounces of herbicide. The 225-gallon tank is more than enough to hold this amount.

The rates are given per 1,000 square feet, so scale by the area in thousands. For 5,600 square feet, the factor is 5.6.

Spray mix needed: 2 gallons per 1,000 × 5.6 = 11.2 gallons.

Herbicide needed: 0.67 ounces per 1,000 × 5.6 = 3.752 ounces, about 3.75 ounces.

So, treat 5,600 square feet with about 11.2 gallons of spray mix containing roughly 3.75 ounces of herbicide. The 225-gallon tank is more than enough to hold this amount.