A man of mass 60 kg is standing on a boat of mass 140 kg, which is at rest in still water. The man is initially at 20 m from the shore. He starts walking on the boat for 4 s with constant speed 1.5 m/s towards the shore. The final distance of the man from the shore is

A boat of mass 80 kg is floating on still water. A dog of mass 20 kg on the boat is at a distance of 10 m from the shore. The dog moves on the boat by a distance of 2m towards the shore. The distance of the dog from the shore is

A woodrn log of mass 120 kg is floating on still water perpendicular to the shore. A man of mass 80 kg is standing at the centre of mass of the log and he is at a distance of 30 m from the shore. When he walks through a distance of 10 m towards the shore and halts, now his distance from the shore is

A wooden log of mass 120kg is floating on still water perpendicular to the shore. A man of mass 80kg is standing at the centre of mass of the log and he is at a distance of 30m from the shore. When he walks through a distance of 10m towards the shore and halts, now his distance from the shore is (A) 20m (B) 24m (C) 26m (D) 28m