answer:
To find the average speed for the second 160 km, we can use the formula:
Average Speed = Total Distance / Total Time
We know that the motorist traveled 320 km in five hours. Since the average speed for the first 160 km was given as 80 km/hr, we can calculate the time taken for the first 160 km:
Time = Distance / Speed = 160 km / 80 km/hr = 2 hours
We can subtract the time taken for the first 160 km from the total time to find the time taken for the second 160 km:
Time for the second 160 km = Total Time - Time for the first 160 km = 5 hours - 2 hours = 3 hours
Now, we can calculate the average speed for the second 160 km:
Average Speed = Distance / Time = 160 km / 3 hours = 53.33 km/hr
Therefore, the average speed for the second 160 km is approximately 53.33 km/hr.
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