Problem B

Don’t Get Mowed Over!

Jon has a grass cutting business. Three of the lawns that he cuts are shown. The lawns are shaded in green and all angles are right angles. His lawnmower can cut a swath of width \(1\) metre.

Which lawn will take the longest to cut? Explain your reasoning.

His lawnmower travels at \(3\) km per hour. What area of lawn, in \(\text{ m}^2\), can he cut in one hour?

How long, in minutes, will it take him to cut each lawn?

**Themes: **Geometry & Measurement, Number Sense