A swimmer wands to cross a river and reach point `B` directly from `A`. The
Channel: Doubtnut
Date: 26/01/2020

A swimmer wands to cross a river and reach point `B` directly from `A`. The speed of the wimmer in still river and that of river flow are same. The dotted line `AN` is normal to flow direction of river. For swimmer to reach point `B`, the angle his velocity relative to river will make with line AN is given by `theta`. then the value of `theta` is :