A river boat tour begins by going 60 miles upstream against a 5 mph current. Then the boat turns around and returns with the current. What still-water speed should the captain use to complete the tour in 5 hours?
speed= distance/time, speed =60/5, speed=12. because the river is travelling with a current of 5mph which takes 5mph off the speed, so the still water speed = 12+5 =17mph Speed=17 mph