Answer:
Speed they were traveling on the drive home = 50 mph
Step-by-step explanation:
Trip to relatives home:
Speed = 55 mph
Time taken = 2 1/2 hours = 2.5 hours
Distance = Speed x Time taken = 55 x 2.5 = 137.5 miles.
Trip to drive home:
Time taken = 2 1/2 hours + 15 minutes = 2 3/4 hours = 2.75 hours
Distance = 137.5 miles.
Speed = Distance / Time = 137.5/2.75 = 50 mph
Speed they were traveling on the drive home = 50 mph
