Pipe A fills a tank in 30 minutes. Pipe B can fill the same tank 5 times as fast as pipe A. If both the pipes were kept open when the tank is empty, how much time will it take for the tank to overflow? Mark as favorite Copy Link 3 minutes 2 minutes 4 minutes 5 minutes Check Answer
12 pumps working 6 hours a day can empty a completely filled reservoir in 15 days. How many such pumps working 9 hours a day will empty the same reservoir in 12 days? Mark as favorite Copy Link 15 9 10 12 Check Answer