A family drove 180 miles to disneyland. If they left at 10:30

a. M. And got there at 3:00 p. M., what was their average speed in mph

Average speed = Distance / time

Distance = 180 mi

Time = time (final) - time (initial)

To find time will be easier if we translate am and pm into 24 h scale.

am will stay the same, so 10:30 am is 10:30. (initial)

pm will be turned (am time + 12), 3: 00 pm = 3:00 + 12 = 15:00 (final)

Time = time (final) - time (initial) = 15:00 - 10:30 = 14:60 - 10:30 = 4h 30 min

4h + 30 min = 4h + 1/2 h = 4.5 h (time)

Average speed = Distance / time = 180 mi / 4.5 h = 40 mi/h

Answer is 40 mi/h.