To find the average speed, we need to divide the total distance traveled by the total time taken.
The total distance traveled is 182 km + 160 km = 342 km.
The time taken for the first destination is 182 km / 60 km/hr = 3.0333... hr (rounded to 4 decimal places).
The time taken for the second destination is 160 km / 78 km/hr = 2.0512... hr (rounded to 4 decimal places).
The total time taken is 3.0333... hr + 2.0512... hr = 5.0845... hr (rounded to 4 decimal places).
Therefore, the average speed for the distance traveled in the first two destinations is 342 km / 5.0845... hr = 67.3172... km/hr (rounded to 4 decimal places).
The average speed is approximately 67.3172 km/hr.