Tủ Sách Du Học | "I have never in my life learned anything ...
Dec 05, 2013·Joe walked for 6 miles at a rate of 3 mi./hr, then he ran for a certain distance at a rate of 8 mil./hr. If his total trip took 2 and 1/2 hour, how far did he run? Joe jogged from home at a rate of 8 mil./hr. Mary left home an hour later by car and overtook Joe in …