Evaluations for input

In Fig. P6.115 all pipes are 8-cm-diameter cast iron. Determine the flow rate from reservoir (1) if valve C is open, with Kvalve = 0.5. <image 1>

(A) 0.0174 m^3/s

(B) 0.0126 m^3/s

(C) 0.0152 m^3/s

Answer with the option's letter from the given choices directly. No punctuation.