Boat is sent across a river with a velocity of 8km / hr. if the resultant velocity of boat is 10km / hr, then velocity of river is
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Velocity of boat Vb and velocity of river Vr are perpendicular, as the boat is traveling across the river.
so resultant velocity magnitude : V
V² = Vb² + Vr²
Vr² = 10² - 8²
Vr = 3 km/hr
so resultant velocity magnitude : V
V² = Vb² + Vr²
Vr² = 10² - 8²
Vr = 3 km/hr
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