What is the velocity

Question

Huck Finn walks at a speed of 0.20 m/s across his raft (that is, he walks perpendicular to the raft's motion relative to the shore). The raft is traveling down the Mississippi River at a speed of 1.50 m/s relative to the river bank. What is Huck's velocity (speed and direction) relative to the river bank?

What formula would I use, I dont really need it all worked out unless you want to. I just am having some trouble with this

Answer 1

There is no formula, just make a triangle and use pythagorean theorem. This is a question about vectors.

a^2 + b^2 = c^2

c = sqrt(.2^2 + 1.5^2)

answer = 1.5132746 m/s

to find the direction, figure out the angle