Final answer:
Martin's time is approximately 64.134 seconds.
Step-by-step explanation:
To find Martin's time, we need to first find Kim's time and then multiply it by 1.26 (1 + 0.26) to get Martin's time.
Kim's time is given as 50.9 seconds for swimming 50 meters.
To find Martin's time, we'll calculate: 50.9 seconds × 1.26 = 64.134 seconds. Therefore, Martin's time is approximately 64.134 seconds.