Ahsoka Tano travels on a raft upstream for 3 hours and then downstream to her starting point for 1 hour. The speed of the raft is 6 mi/h in still water. What is the speed of the stream’s current?

Question

Ahsoka Tano travels on a raft upstream for 3 hours and then downstream to her starting point for 1 hour. The speed of the raft is 6 mi/h in still water. What is the speed of the stream’s current?

Answer 1

When you travel with the current, it works with you. If I can row 2 mph and the current is 3 mph, I'll travel 5 mph downstream (2 + 3 = 5).

When you travel against the current, it works against you. If I try to travel upstream, I'm gonna go backward downstream at 1 mph (2 - 3 = -1).

d = rt, and the distance is the same.

3(6 - c) = 1(6 + c)

Solve for c for your answer. Go!