Question

A boat is traveling upstream at 14 km/h with respect to the water of a river. The water itself is flowing at 9 km/h with respect to the ground. What is the velocity of the boat with respect to the ground

Answer 1

Answer:

16.64 km/h

Explanation:

Think of the x and y components as the a and b sides of a triangle and simply do the Pythagorean Theorem:

$a^2+b^2=c^2$

$14^2+9^2=c^2$

$\sqrt{196+81}=c$

$\sqrt{277}=c$

$16.64 km/h$