Width of a river is `30 m,` velocity is ` 4 m//s` and rowing velocity is `5 m//s`  (a) Make the
Channel: Doubtnut
Date: 2020-07-05

Width of a river is `30 m,` velocity is ` 4 m//s` and rowing velocity is `5 m//s`  (a) Make the velocity diagram for crossing the river in shortest time. Then, find this shortest time, net velocity of boatman and drigt along the river.  (b) Can the boatman reach a point just oppsite on the other shore? If yes then make the velocity diagram, the direction in which the should row his boat and the time taken to cross the river in this case.  (c) How long will it iake hom to row `10 m` up the stream and then back to his starting point?