Question

What is To Cross the River in the Shortest Time in Relative Velocity in a Plane?

Answer

The shortest time is given by, t = d/v_b. At this time, boat will reach point S on the opposite bank of the river at a distance x from Q. We can write, x = dtanθ = v_w/v_b ⇒ x = d(v_w/v_b) x is also called drift.