Solution: Represent the times as $(x, y)$ in a 60-minute square. The condition $ y \geq x + 20 $ defines a triangular region with base $ 60 - 20 = 40 $ minutes. The area of this region is $ \frac12 \times 40^2 = 800 $. The total area is $ 60^2 = 3600 $. The probability is $ \frac8003600 = \frac29 $. - Appfinity Technologies