Ian’s house is located 20 km north of Ada’s house. At 9:00 am, Ian leaves his house and jogs south at 8 km/h. At the same time, Ada leaves her house and jogs east at 6 km/h. When are Ian and Ada closest together, given that they both run for 2.5 hours?
Desmos demonstration: https://www.desmos.com/calculator/7k15kyccol