To find out how long the second part of the trip will take, we need to subtract the time spent at the wildlife refuge from the total trip time and then calculate the remaining travel time.
The total distance to the museum is 62.5 miles, and the class will spend 0.5 hours at the wildlife refuge.
So, the remaining distance to be covered after the stop is 62.5 miles.
Given that the bus travels at an average speed of 50 miles per hour, we can use the formula:
Time = Distance / Speed
So, Time = 62.5 miles / 50 miles per hour = 1.25 hours
Therefore, the second part of the trip will take 1.25 hours.
