Answer:
It will take you 6 hours to get back home
Step-by-step explanation:
1. Let's review the information given to us to answer the question correctly:
Speed of first leg of the trip = 60 mph
Speed of second leg of the trip = 40 mph
Time of the first leg of the trip = 4 hours
Time of the second leg of the trip = x hours
2. When you return home, you drive slow. How long will it take to get back home?
For answering the question, we will use the Inverse Rule of Three because the less speed you drive the more time it takes you to finish the trip, as follows:
Speed Time
60 mph 4 hours
40 mph x hours
40x = 60 * 4 (Inverse Rule, not Direct Rule)
40x = 240
x = 240/40
x = 6
It will take you 6 hours to get back home
