Answer:
12 hours
Step-by-step explanation:
The formula for distance is [tex]d=rt[/tex], distance = rate multiplied by time.
We know that you travel at 50 mph, which is our rate, and we travelled for 42 hours, which is the time.
So the distance is [tex]42\cdot 50 = 2100[/tex] miles.
However, we weren't constantly driving at a speed of 50 mph - once in a while we were driving at 0 mph because we had taken rests.
That means the total miles lost for taking rests will be [tex]2100-1500 = 600[/tex] miles.
Since we travel at a speed of 50 mph, that means we spent a total of [tex]600\div 50 = 12[/tex] hours not driving.
Hope this helped!
