Answer:
40 minutes
Step-by-step explanation:
Joelle wants to run for 20 minutes at rate 6 miles per hour so the distance traveled in this duration will be calculated by multiplying speed and time(in hours).
So, distance traveled in 20 minutes = [tex]6 \times \frac{20}{60}[/tex] = 2 miles.
As Joelle have to travel total 4 miles, the distance remaining after 20 minutes of traveling = 4 - 2 = 2 miles.
Now she has to walk for the remaining distance i.e. 2 miles with a speed of 3 miles/hour.
The time required to travel 2 miles will be calculated by dividing distance with speed.
So, time required = [tex]\frac{2}{3}[/tex] hours.
Thus time in minutes = [tex]\frac{2}{3}\times 60[/tex] = 40 minutes.
