If there are n ways of completing a task, and after completing the task in any of these n ways, there are m ways of completing a second task, how many ways are there of completing both tasks?

Apassenger train and a freight train leave san jose at 3pm, traveling in the same direction. the passenger train is going three times as fast as the freight train. at 6pm they are 240 miles apart. how fast is each travelling? explain your answer and show your