An automobile travels between the 176.5-m and 295.7-m markers on the highway in 12.4s

I've got a great idea !  Let's calculate the car's average speed !

Average speed  =  (distance covered)  /  (time to cover the distance)

  Distance covered = (position at the end) - (position at the beginning)

                               =  (295.7 m) - (176.5 m)  =  119.2 m

Average speed  =  (119.2 m)  /  (12.4 s)  =  9.61  'm' per 's' .

If your workout exceeds an hour you should substitute "a sports drink" for water.hope my answer has you : )