Question

a boat sails across a river with a velocity of 10 km/hr. if resultant boat velocity is 14 km/hr, then what is the velocity of river water

Answer 1

Answer:

9.2 km/h

Explanation:

velocity of boat (Vb)  = 10 km/h

resultant velocity V = 14 km/h

velocity of river Vr = ?

V = Vr i + Vb j

|V| = √(Vr² + Vb²)

14 = √(Vr² + 10²)

Vr² = 96

Vr = √96 = 9.2 km/h