Q) A cistern has two pipes one can fill it with water in 16 hours and other can empty it in 10 hours. In how many hours will the cistern be emptied if both the pipes are opened together when 1/5th of the cistern is already filled with water? a) 11.4 hours […]

A cistern has two pipes one can fill it with water in 16 hours and other can empty it Read More »