Atrain left denver, colorado at 12: 00 going 250 kilometers per hour. how long will it take the train to get to chicago, illinois if the train took a 2 hour stop every 250 kilometers?

Aman is 6 feet 3 inches tall. the top of his shadow touches a fire hydrant that is 13 feet 6 inches away. what is the angle of elevation from the base of the fire hydrant to the top of the man's head?

The longer leg of a 30-60-90 trangle is 18

Atourist boat is used for sightseeing in a nearby river. the boat travels 2.4 miles downstream and in the same amount of time, it travels 1.8 miles upstream. if the boat travels at an average speed of 21 miles per hour in the still water, find the current of the river.