Answer:
35.09hours
Step-by-step explanation:
Since we are not told what to find, we can as well look for the time it took to ascend
Given
Distance below surface of water = 2000m
Speed = 57m/hr
Required
Time
Using the formula;
Speed = Distance/Time
Time = Distance/Speed
Time = 2000/57
Time = 35.09hours
Hence it took 35.09hours to ascend