Question

Quincy is going on a vacation to Australia. His flight leaves at 9:50 A.M. It takes 20 minutes to get to the airport, and Quincy wants to be at the airport 1 hour and 5 minutes before his flight leaves. What is the latest time that Quincy can leave for the airport?

Answer 1

Answer: the latest time is 8:25 AM

Step-by-step explanation:

It takes 20 minutes to get to the airport. If Quincy wants to be at the airport 1 hour and 5 minutes before his flight leaves, it means that the maximum amount of time that Quincy has before left before she gets to the airport is

1 hour + (20 + 5) minutes = 1 hour 25 minutes.

His flight leaves at 9:50 A.M. This means that the latest time that Quincy can leave for the airport would be 9:50 A.M. - 1:25

= 8:25 AM

Answer 2

If it takes 20 minute to get to the airport, and he wants to be there an hour and 5 minutes before his flight leaves, we have to subtract the time he leaves (9:50) by 1 hour and 5.

9:50 - 1 hour and 5 minutes.

9:50 - 65 minutes.

9:50 - 65 = 8:45.

Which means he must be at the airport at 8:45.

BUT,

The question is asking for the latest time that Quincy can LEAVE for the airport, which means it's 8:45 - 20 minutes, since it takes 20 minutes to get to the airport:

8:45 - 20 = 8:25