Question

A cistern has two pipes one can fill it with water in 24

Q: Answer-A cistern has two pipes one can fill it with water in 24 hours and other can empty it in 9 hours. In...

If both pipes are open, then total units per hour empty the tank A-B 3 - 8 -5 units According to question, Tank has 58 of its total capacity in the beginning 58 times 72 45 units Time taken to empty the tank 45-5 9 hours

hours and other can empty it in 9 hours. In how many hours will the cistern be emptied if both the pipes are opened together when (5 )/8th of the cistern is already filled with water?

A 20 hours

B 18 hours

C 15 hours

D 9 hours

E None of these