Average Speed = $2xy / (x + y) = (2 * 4 * 6) / (4 + 6) = 48 / 10 = 4.8$ km/h.
औसत गति = $2xy / (x + y) = (2 * 4 * 6) / (4 + 6) = 48 / 10 = 4.8$ किमी/घंटा।