How long will it take for a raft to travel 200 m along the river if its speed is 0.5 m / s.

The time the raft moves along the river can be calculated using the formula:
t = S / V, where S is the distance covered by the raft (m), V is the speed of propagation of sunlight in vacuum (S = 200 m), V is the speed of the raft (V = 0.5 m / s).
Let’s calculate the time of movement of the raft:
t = S / V = 200 / 0.5 = 400 s.
Answer: The time of movement of the raft is 400 s.