question_answer

A gardener uses pipes to water his garden from a tank. For his entire garden he uses 6 pipes to water and it takes him 1 hour 20 minutes to completely empty the tank. How much time will one pipe take to empty the tank?

A) 8 hours      

B) 8 hours and 36 min

C) 7 hours and 45 min

D) 9 hours and 55 min

E) None of these