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### Course: 4th grade > Unit 14

Lesson 4: Time# Time word problem: puzzle

Lindsay finds out how long it took to solve a puzzle when given the start and finish time. Created by Lindsay Spears.

## Want to join the conversation?

- Why is it the differents of1:00to1:30am?(3 votes)
- The different is that1:00is meaning 1 o clock. But1:30is 30 minutes after1:00so its called 1 thirty or half past 1. Did it help?(5 votes)

- what is infinity + infinity(2 votes)
- Infinity is a concept. You cannot do operations on it.(5 votes)

- How many seconds two hours have(2 votes)
- there are 7200 secs in 2 hours.(5 votes)

- yum this is confusing how do I add(3 votes)
- ngl this video is quite short1:29first time i saw it it was1:30why? is it laggy?(3 votes)
- why did it change from1:30to1:29?(3 votes)
- Just YouTube things.(1 vote)

- Can you do other stratigys(3 votes)
- Sup dudes! I don't like this! Help!(2 votes)
- At0:10I realized it was 37 minutes(2 votes)
- Did you make the problem or it was copied?(1 vote)

## Video transcript

- [Voiceover] Amelia
started a puzzle at 12:56 pm and solved it at 1:33 pm. How long did it take
Amelia to solve the puzzle? So we can see she started at 12:56 pm and ended at 1:33 pm. These are both pm and we'll
assume on the same day, so that means it didn't take all the way from morning to night. They're both afternoon. So she started at 12:56 and we want to know how long it takes to get to 1:33 when she
finished the puzzle. Well, from 12:56 to 1:00 pm, we can figure out how long that is. That's only four minutes,
there's only four minutes between 12:56 and 1:00, and then to get from 1:00
all the way to 1:33 pm, is another 33 minutes, so Amelia worked for four minutes, plus another 33 minutes after one o'clock. She worked for four minutes before 1:00, 33 minutes after one, so
she worked for a total of 37 minutes on her
puzzle before solving it.