A train travels 270 miles in 3 hours. At the same rate, how many additional hours would it take to travel an additional 180 miles?
How fast does the train travel? ** The rate is 270/3=<<270/3=90>>90 mph.
How many hours would it take to travel an additional 180 miles? ** Then it takes an additional 180/90=<<180/90=2>>2 hours.
#### 2