if a motorboat travels at 25km/hr down a river whose velocity is 4km/hr wgat is the boats actual velocity?

a. 21km/hr
b. 29km/hr
c. 100km/hr
d. 6.2km/hr

please repost the answer

To find the boat's actual velocity, we need to consider the concept of relative velocity. The boat's actual velocity is the result of combining the velocity of the boat with the velocity of the river.

In this case, the boat is traveling at 25 km/hr, while the river is flowing at a velocity of 4 km/hr. Since the river's velocity is in the same direction as the boat's motion, we can subtract the river's velocity from the boat's velocity to find the actual velocity.

Therefore, the boat's actual velocity is 25 km/hr - 4 km/hr = 21 km/hr.

So, the correct answer is option a) 21 km/hr.