Question

It takes 1 cup of liquid fertilizer to make 72 gallons of spray. How much liquid fertilizer is needed to make 80 gallons of spray?

Answer 1

We know that

• 1 cup of liquid fertilizer to make 72 gallons of spray.

To know how many cups we can get from 80 gallons of spray, we just have to form the following proportion

`\frac{1\text{fetilizer}}{72\text{gallons}}=\frac{x}{80\text{gallons}}`

We solve for x

`x=(80\cdot1)/(72)\approx1.11`

Therefore, 80 gallons of spray will take 1.11 cups of liquid fertilizer, approximately.