Recent content by KARMA will defeat you!

Two pumps of different sizes, working together, can empty a fuel tank in 5 hours. The larger pump can empty this tank in 4 hours less than the smaller one. If the larger pump is out of order, how long will it take the smaller one to do the job alone? please show work >.<

You commute 56 miles one way to work. The trip to work takes 10 minutes longer than the trip home. You average speed on the trip home is 8mph faster. What is your average speed on the trip home?