Joy got on a train at 1:35 p. m. Joy got off the train at 3:30 p. m. For how many minutes was Joy on the train?

This question is about elapsed time.

Let's solve this step-by-step.

1.) 1:35 PM is a tricky time to deal with. Let's change it to 2:00 PM by adding 25 minutes. There are 60 minutes in an hour. Therefore, 35 minutes + 25 minutes, or 60 minutes, makes it 2:00 PM.

1:35 PM = > 2:00 PM (+25 min)

2.) Now, let's add one more hour to make it 3:00 PM.

2:00 PM = > 3:00 PM (+60 min)

3.) Now, simply add 30 minutes to make it 3:30 PM.

3:00 PM = > 3:30 PM (+30 min)

4.) Now, add the time up together.

25 + 60 + 30.

=> 85 + 30

=> 115 minutes

5.) Joy was on the train for 115 minutes. (It asked for minutes.)