Oscar takes twice as long as teona to complete the same job. Working together they can complete 3 jobs in 4 hrs. how long would it take Teona working alone to complete 1 job​

This size running track is usually called a 400 meter track. however if a person ran as close to the inside as possible on the track they would run less than 400 meters in one lap. how far away from the inside border would someone have to run to make one lap equal exactly 400 meters