Suppose two trains leave Corpus Christi, Texas, at the same time, traveling in opposite directions. One train travels 10 mph faster than the other. In 2.5 hours, the trains are 205 miles apart. Find the speed of each train.

The number of days it takes a theater crew to set up a stage for a musical varies inversely as the number of workers. the stage can be set up in 3 days by 20 workers how many days would it take if only 12 workers were available?

Morgan and Sass were visiting a friend in Chicago. Morgan has to leave at noon, but Sass did not leave for another 0.5 hours. On the road, Morgan averages 70 miles per hour and Sass averages 35 miles per hour. They left from the same point (their friends house), however they drove off in opposite directions. How long would Morgan have been driving when they will be 245 miles apart?

It took a salmon 45 seconds to swim upstream to a certain spot. The salmon then turned around to swim with the current and arrived at its starting place in 17 seconds. If the current in that part of the stream is 0.43 meters per second, what was the speed of the salmon?