A fisherman had to be at an appointment at 10:30. He went fishing at 7:00 and was 20 miles from the boat dock. If the fisherman's boat goes 80 miles per hour,what time will he reach the dock if he left at 9:30 from his current position?

20 miles is 1/4 of the 80mph, so it will take him 15 minutes to reach the dock.

20/x = 80/1

To determine the time the fisherman will reach the dock, we need to calculate the distance he has to travel and divide it by the speed of his boat.

Given:
- The fisherman left at 9:30.
- He is currently 20 miles away from the dock.
- His boat travels at a speed of 80 miles per hour.

First, we need to calculate the distance the fisherman needs to cover.
Since he is currently 20 miles away from the dock, the total distance to cover would be the sum of the current position and the distance between the dock and his current position.

Total distance = 20 miles + 20 miles = 40 miles

Next, we can calculate the time it will take for the fisherman to reach the dock by dividing the total distance by the speed of the boat.

Time = Distance / Speed
Time = 40 miles / 80 miles per hour = 0.5 hour

Since the time is in hours, we multiply it by 60 to convert it into minutes.

Time = 0.5 hour * 60 minutes per hour = 30 minutes

Therefore, the fisherman will reach the dock at 9:30 + 30 minutes = 10:00.

So, if the fisherman left at 9:30 from his current position, he would reach the dock at 10:00.