Final answer:
The diver will need approximately 16.67 seconds to reach the surface.
Step-by-step explanation:
To find the time the diver will need to reach the surface, we can use the formula:
Time = Distance / Speed
The distance the diver needs to surface is 25 meters, and the speed the diver can swim is 1.5 meters per second. Plugging these values into the formula:
Time = 25 meters / 1.5 meters per second = 16.67 seconds
Therefore, the diver will need approximately 16.67 seconds to reach the surface.