A raft of mass 30 kg and length 5m is floating on water. A man of mass 60 kg is standing on the raft at one end. If the man starts walking towards the other end of the raft with a velocity of 2 m/s relative to the raft, what will be the velocity of the man relative to the shore? There is no friction between the raft and water.

• A

  $\frac{3}{2}\mathrm{m}/\mathrm{s}$

• B

  $\frac{3}{4}\mathrm{m}/\mathrm{s}$

• C

  $\frac{2}{3}\mathrm{m}/\mathrm{s}$

• D

  $\frac{1}{3}\mathrm{m}/\mathrm{s}$