Final answer:
It would take Jenna 30 minutes to run 3km at a speed of 6km per hour, as time is calculated by dividing the distance by the speed.
Step-by-step explanation:
To determine how long it will take Jenna to run 3km at a speed of 6km per hour, we can use the formula for time, which is time = distance / speed. Here the distance Jenna wants to run is 3km and her speed is 6km per hour. Therefore, we calculate the time by dividing the distance by the speed.
Time = distance / speed = 3km / 6km per hour = 0.5 hours.
To convert hours to minutes, we multiply by 60 minutes per hour.
Time in minutes = 0.5 hours * 60 minutes per hour = 30 minutes.
Therefore, it would take Jenna 30 minutes to run 3km at her running speed of 6km per hour.