Water Undergoes Viscous Flow Through Two Pipes with the Same $\times$

Water undergoes viscous flow through two pipes with the same pressure difference between the ends.Pipe 1 has three times the diameter as pipe 2.Pipe 1 has 2 times the length of pipe 2.If the flow rate through pipe 1 is 0.400 cm³/s,then what is the flow rate through pipe 2?

A) 6.22 $\times$ 10^-3 cm³/s
B) 7.78 $\times$ 10^-3 cm³/s
C) .8.33 $\times$ 10^-3 cm³/s
D) 9.88 $\times$ 10^-3 cm³/s
E) 10.80 $\times$ 10^-3 cm³/s

Correct Answer:

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