You had an emergency at hôme and you called the police at 11:47 p.m. They
arrived at your house at 12:07 a.m. How long did it take them to get to your
house.
The answer is 20 minutes. If you look at the times it's 11:47 and 12:07. Notice the times end in 7. You would add ten minutes until you get the time, and in the end you have 20 mins.
