Mr. X has to be at work by 8:00 AM and it would take him 10 minutes to get dressed, 15 minutes to eat, and 40
minutes to ride to his work. What time should he get up to get to his work on time?
Solution:
What is the problem asking?
You should know what time Mr. X would get up in order for him to get to work on time.
What are the data presented in the problem?
10 minutes – to get dressed
15 minutes – to eat
40 minutes – travel time to his work
What process should we use in order to solve the problem?
You need to know the total number of minutes Mr. X takes to prepare before he goes to his work and subtract it
from his target time to be able to know what time he should get up.
10 + 15 + 40 = 65 minutes
Mr. X needs 65 minutes in order for him to prepare and be ready for work. 65 minutes is also equivalent to 1 hour
and 5 minutes.
Now that we know how long he prepares himself, we can now deduct it from the target time which is 8:00 AM.
8:00 AM – 65 minutes = 6:55 AM
Therefore, Mr. X should be awake by 6:55 AM so that he can be at work by 8:00 AM.