Question

A city water supply tank has two inlet pipes X and Y, which can fill it in 20 and 30 hours

respectively, and an outlet pipe Z which can empty a full tank in 40 hours. If the tank is empty

and the taps are opened in succession for one hour each, and the process continues, in how

many hours will the tank get filled?​

Answer 1

Answer:

Ok,

Step-by-step explanation:

A lil Bit Justification For Your Understanding :—

They Collectively have to fill the tank. 2 pipes are doing work in the same direction and the third is opposing them. So, this tells us that the sign of 2 pipes will be different from the other two {Difference is Absolute so we can take any of those two faction to be negative or positive}. they are performing one action so the sum of the work potential shall be equal to 1 (or -1 as I took just for ease) and we know time taken is inversely proportional to work potential. So that's all u need to know to solve (•‿•)

Hope it Helps

Please mark me brainliest

Answer 2

Answer:

49 1/2

Step-by-step explanation:

This is the correct ans