For four particle A,B,C,D, the velocities of one with respect to other are given as `vecV_(DC)` is
Channel: Doubtnut
Date: 2020-08-02

For four particle A,B,C,D, the velocities of one with respect to other are given as `vecV_(DC)` is `20(m)/(s)` towards north, `vecV_(BC)` is `20(m)/(s)` towards east and `vecV_(BA)` is `20(m)/(s)` towards south. Then `vecV_(DA)` is