Pauline travels between two cities. First she drives for 31 minutes at an average speed of 82 km/hr then for 23 minutes at an average speed of 51 km/hr, then she spends 25 minutes eating lunch and buying gas, and then she drives for 15 minutes at an average speed of 44 km/hr. Find Pauline’s average speed for this trip. Express it in kilometers and round your answer to the nearest kilometer I know I have to use the average speed formula, which is total distance/time (94 minutes in this case). How do I get the time taken from 31 minutes at an average speed of 82km/hr, etc...?