Hey.. ♥️♥️ me in solving this question

Let Vb = the velocity of the boat.

Vw = the velocity of the flow of the stream.

X = the distance the boat traveled downstream.

So X = (Vb+Vw)T

After turning, the boat takes t time to get back to the float.

Then x -l = (Vb-Vw)t

and l = Vw * (T+t)

Replacing the equations for their variables you get (Vb+Vw)T-Vw(T+t) = (Vb-Vw)t

Simlify to: Vw = l/T+t = l/2T

Now using the values in the problem:

Vw = 12km / 2 * 60 = 12 km / 2hrs = 6km

The answer is 1. 6 km h^-1

your mom

explanation:

i think the answer is b