A novice captain is pointing his ferryboat directly across the river at a speed of 15.7 mi/h. If he does not pay attention to the current that is headed downriver at 5.35 mi/h. what will be his resultant speed and direction? (Consider that the current and the boat's initial heading are perpendicular to each other)

A novice captain is pointing his ferryboat directly across the river at a speed of 15.7 mi/h. If he does not pay attention to the current that is headed downriver at 5.35 mi/h. what will be his resultant speed and direction? (Consider that the current and the boat's initial heading are perpendicular to each other)