The velocity for a 1: 25 model of the ship in a towing tank should be

Question

A ship with hull length of 100 m is to tun with a speed of 10 m/s. for dynamic similarity,, the velocity for a 1: 25 model of the ship in a towing tank should be

                                              

(a) 2 m/s                      (b) 10 m/s

(c) 20 m/s                    (d) 25 m/s