Pauline travels between two cities.

Pauline travels between two cities. First she drives for 47 minutes at an average speed of 86 km/hr then for 23 minutes at an average speed of 77 km/hr, then she spends 16 minutes eating lunch and buying gas, and then she drives for 12 minutes at an average speed of 58 km/hr. Find Pauline's average speed for this trip. Express it in kilometers per hour and round your answer to the nearest km/hr.