Answer: 23.333 mph approximately
Step-by-step explanation:
distance = rate*time
d = r*t
d = 30*1
d = 30
This tells us that you traveled 30 miles for the first portion of the trip.
Let's see how far you travel for the second portion.
d = r*t
d = 20*2
d = 40
Therefore you traveled 40 miles for the second portion.
The total distance traveled is 30+40 = 70 miles.
This is over the course of 1+2 = 3 hours.
speed = distance/time
speed = (70 miles)/(3 hours)
speed = 23.333 mph approximately