I.E Irodov Solution

Problem1.2   A point traversed half the distance with a velocity Vo. The remaining part of the distance was covered with velocity VI for half the time, and with velocity V2 for the other half of the time. Find  the mean velocity of the point averaged over the whole time of motion. Ans:-   

Problem1.1 A motorboat going downstream overcame a raft at a point A;t = 60 min later it turned back and after some time passed the raft at a distance l = 6.0 km from the point A. Find the flow velocity. Assuming duty of motorboat is constant. Ans :-