Anita jogs at a constant speed of 4 miles per hour. Anita’s brother leaves their house 12 minutes after her, and he catches up to her 24 minutes later. If Anita’s brother is also running at a constant rate, what is his speed, in miles per hour?
Anita jogs at a constant speed of 4 miles per hour. Anita’s brother leaves their house 12 minutes after her, and he catches up to her 24 minutes later. If Anita’s brother is also running at a constant rate, what is his speed, in miles per hour?
[12 + 24] / 60 =0.6 of an hour that Anita has been jogging.
4 mph x 0.6 hours =2.4 miles that Anita ran in 0.6 of an hour.
2.4 miles / [24/60] = 6 mph - her btother's speed.
