汇流水管如图所示,已知三部分水管的横截面积分别为A(来学网)=0.01m,A=0.005m,A=0.01m,入流速度v=4m/s,v=6m/s,求出流的流速v为:
  • A.
    (来学网)8m/s
  • B.
    (来学网)6m/s
  • C.
    (来学网)7m/s
  • D.
    (来学网)5m/s