There are three pipes A,B & C which can fill empty tank in 30 min, 20 min, and 10 min. All three pipes are opened and the pipes discharge chemical P, Q & R. What is the proportion of solution P, Q & R in the liquid in the tank after 3 min?
Let me begin by saying that it was very naughty of you for getting us to do your homework. But because you are a new user, I have decided I will post this to help you just this once:
Let x be the rate at which water exits pipe C. (volume/time)
From the above information, we can deduce that x = 3z. This is because a fixed volume is filled in 1/3 time when pipe C is used than when pipe A is used. Since Rate has time on the denominator, the rate water exits pipe C must be 3 times faster than pipe A.
Similarly, y = 1.5z.
If all pipes are oppened at once, water enters the system at a rate equal to:
Therefore, proportion of liquid from pipe A = z/5.5z = 1/5.5