A216-m-wide river flows due east at a uniform speed of 2.2 m/s. a boat with speed of 7.9 m/s relative to the water leaves the south bank of the river pointed in a direction 34 degrees west of north. what is the magnitude of the boat's velocity relative to the ground (in m/s)

The magnitude of the velocity of boat w.r.t ground is 6.2015 m/s

Solution:

As per the question;

Width of the river, w = 216 m

Uniform speed of boat due east,

Angle in north west direction,

Velocity of the boat relative to water,

Now,

Velocity of the boat relative to the water is given by:

Also, velocity of water w.r.t ground is

Now,

Magnitude of the velocity of boat w.r.t ground is given by:

well, you would divide 135 by 33 to get your answer. then that is how many seconds it would take. boardman should fly about 132 m or 4.090909090909091 seconds.