Jenny is running a 10-km race that starts at 9:00 a.m. Linus is running a 6-km race that starts 20 minutes later at 9:20 a.m. If Linus takes 30 minutes to finish his race, what must Jenny’s average running speed be, in kilometers per hour, to finish her race at the same time Linus finishes his race?

Guest Jul 23, 2022