A particle is moving on a circular path of radius R with constant speed v. During motion of the particle form point A to point B

Options

A. Shortest time in which the person could swim from one bank to the other (in running water) will be `12` min
B. Shortest time in which the person could swim from one bank to the other (in running water) will be `15` min
C. Angle made by person with the upstream is `cos^(-1)((3)/(5))` for zero drift
D. Angle made by person with the upstream is `cos^(-1)((3)/(4))` for zero drift

Answer

B, D

Explanation

Shortest time `= (L)/(Vcos0^(@)) = 15` min.