Math Rabbit is a 1986 video game that serves as a spin-off to the Reader Rabbit edutainment series. It was made by The Learning Company for MS-DOS and Apple II. A Deluxe version was released in 1993 for MS-DOS, Macintosh, and Windows 3.x. Then in 1997, the game was remade for Windows and Macintosh as Reader Rabbit's Math 1. The final remake for Windows and Macintosh in 1998 is Reader Rabbit's Math Ages 4-6, with a personalized version released in 1999.
"A" can do a certain job in 4 hours, "B" can do the job in 6 hours, "C" can do the job in 8 hours. How long will it take to do the job if "A" and "B" work for 1 hour and "B" and "C" finish the job?
A tank can be filled by one pipe in 9 hours and another pipe in 12 hours. Starting empty, how...