Answer :
Final answer:
Lauren's average speed for her trip was 54.34 km/hr. This was calculated by adding up the total distance she traveled and dividing it by the total time it took her.
Explanation:
To find Lauren's average speed, we need to add up the total distance she traveled and divide it by the total time it took.
The total distance she traveled is 13,500m + 12,800m = 26,300m (or 26.3 km since 1 km = 1000m).
For the total time, she drove at 60.0 km/hr for the first 13,500m. To convert this distance to hours (since her speed is in km/hr), we need to use the speed equation: Speed = Distance/Time.
Solving for time gives us
Time = Distance/Speed
= 13.5km/60km/hr
= 0.225 hours.
Then, for the second part of her trip, she drove for 15 minutes and 30.0 seconds.
Converting this to hours gives us 15.5/60 = 0.25833 hours
Adding these times together, we get a total time of 0.225 hours + 0.25833 hours = 0.48333 hours. Now, we can find her average speed by dividing her total distance by her total time:
Average speed = Total Distance / Total Time = 26.3 km / 0.48333 hours = 54.34 km/hr.
Learn more about average speed here:
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