centre line velocity of 1.5 m/s is:

Question

The discharge in m³/s laminar flow through a pipe of diameter 0.04 m having a centre line velocity of 1.5 m/s is:                                                                            

      (a) 3$\pi$ / 50                                                           (b) 3$\pi$  / 2500

      (c) 3$\pi$  / 5000                                                       (d) 3$\pi$  / 1000