Answer:
11 cm/s.
Step-by-step explanation:
The speed of the water ripples can be calculated using the formula:
speed = distance / time
In this case, the distance traveled by the water ripples is 55cm and the time taken to travel that distance is 5 seconds.
Substituting these values into the formula, we get:
speed = 55cm / 5s
speed = 11 cm/s
Therefore, the speed of the water ripples is 11 cm/s.