1. The problem asks how much money you would make after 24 hours if you earn 20 yen per minute. 2. First, calculate the total number of minutes in 24 hours. 3. Since 1 hour = 60 minutes, then 24 hours = $$24 \times 60 = 1440$$ minutes. 4. Next, multiply the number of minutes by the rate per minute to find the total earnings. 5. Total earnings = $$1440 \times 20 = 28800$$ yen. 6. Therefore, you would make 28800 yen after 24 hours at 20 yen per minute.