Final answer:
Adrian takes 3 minutes per lap to swim, so for 50 laps it will take 150 minutes, or 2.5 hours.
Step-by-step explanation:
To determine how long it will take Adrian to swim 50 laps, we must first calculate the time it takes to swim one lap and then use that to find the time for 50 laps. Adrian takes 12 minutes to swim 4 laps, which means each lap takes 12 minutes ÷ 4 laps = 3 minutes per lap. Now, for 50 laps, the time required would be 50 laps × 3 minutes per lap = 150 minutes.
To convert 150 minutes to hours, we divide by 60, since there are 60 minutes in an hour. So, 150 minutes ÷ 60 minutes per hour = 2.5 hours. Therefore, it will take Adrian 2.5 hours to swim 50 laps.