Robinson doughnut factory produce is 18,000 doughnuts every day they have a fleet of 12 delivery trucks with the doughnuts are divided evenly how many doughnuts will be loaded onto the truck

Starting at home, emily traveled uphill to the hardware store for 606060 minutes at just 666 mph. she then traveled back home along the same path downhill at a speed of 121212 mph. what is her average speed for the entire trip from home to the hardware store and back?