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The water flowing through a 1.9 cm (inside diameter) pipe flows out through three 1.3 cm pipes.

**(a)**If the flow rates in the three smaller pipes are 28, 15, and 10 L/min, what is the flow rate in the 1.9 cm pipe?

The basic continuity idea is A1v1 = A2v2.

The flow rate equation is R = Av.

For each of the 3 pipes, the flow rate is given (R) and the area can be calculated (pi*r^2).

To find the flow rate of the 1.9cm pipe, we need to know the speed of water flow (v, since R =Av).

But I don't know how to put them all together and relate them. I tried things but I always got the wrong answer. Please give me a hint or help. Thanks.