A pipe can fill a tank in ‘x’ hours and another pipe can empty it in ‘y’ hours (y > x). If both the pipes are open, in how many hours will the tank be filled?
A pipe can fill a tank in ‘x’ hours and another pipe can empty it in ‘y’ hours (y > x). If both the pipes are open, in how many hours will the tank be filled?
[A](y – x) hours
[B](x – y) hours
[C]
[D]
Part of the tank filled in 1 hour =
Part of the tank emptyied in 1 hour =
Part of the tank filled in 1 hour when both are opened =
∴ Tank will be filled in 
Hence option [C] is the right answer.
