Elapsed Time Math Example 2

Follow the full solution, then compare it with the other examples linked below.

Example 2

medium
A movie starts at 2:15 PM and lasts 1 hour and 45 minutes. What time does it end?

Solution

  1. 1
    Start: 2:15 PM.
  2. 2
    Add 1 hour: \(2:15 + 1:00 = 3:15\) PM.
  3. 3
    Add 45 minutes: \(3:15 + 0:45 = 4:00\) PM.
  4. 4
    The movie ends at 4:00 PM.

Answer

4:00 PM
Add the hours first, then the minutes. \(15 + 45 = 60\) minutes = 1 extra hour, so \(3:15 + 45\,\text{min} = 4:00\) PM.

About Elapsed Time

Calculating the amount of time that passes between a start time and an end time, using hours and minutes in base-60 arithmetic rather than base-10.

Learn more about Elapsed Time →

More Elapsed Time Examples

Example 1 easy

School starts at 8:00 AM and ends at 3:00 PM. How long is the school day?

Example 3 easy

A TV show starts at 7:30 PM and ends at 8:00 PM. How long is the show?

Example 4 medium

Lena starts reading at 4:20 PM and reads for 55 minutes. What time does she stop?

← All Elapsed Time Examples Elapsed Time Concept

Related Concepts

Telling TimeSubtraction