Answer:
He mows 30 square feet of the garden in 1 minute.
Explanation:
This equation is from a topic called rates. Which would help us to be able to determine the rate at which Ned works with respect to time consumed.
Ned mows a 450 square foot garden within 15 minutes.
Thus, he would mow
square foot of the garden in 1 minute.
He mows 30 square feet of the garden in 1 minute.
This shows the actual rate at which Ned worked per time. So we could determine how he worked by considering an increasing value of time.