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If a group of students went somewhere at 3:30 pm and left at 5:15 pm, how long were they there?

Option 1: 1 hour 45 minutes
Option 2: 1 hour 30 minutes
Option 3: 2 hours 15 minutes
Option 4: 1 hour 45 minutes

User Ppalmeida
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1 Answer

5 votes

Final answer:

The students were at the location for 1 hour and 45 minutes, as calculated by subtracting the arrival time from the departure time.

Step-by-step explanation:

If a group of students arrived somewhere at 3:30 pm and left at 5:15 pm, we can calculate the time they were there by subtracting the start time from the end time. Subtracting the hours: 5 pm minus 3 pm gives us 2 hours. Then, subtracting the minutes: 15 minutes minus 30 minutes gives us a negative number, so we need to adjust our hours by subtracting one hour and adding 60 minutes to the minutes part: 1 hour plus (60 + 15 - 30) minutes equals 1 hour plus 45 minutes. This means the students were there for a total of 1 hour and 45 minutes.

User Matt Refghi
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