yego.me
yego.me
💡 Stop wasting time. Read Youtube instead of watch. Download Chrome Extension

Length of a trip in 24 hour time | Math | Khan Academy

2m read
·Nov 10, 2024

Hello! So we're told Colette rides her bike home from school every afternoon. She leaves school at 14:55 and arrives home at 15:25. How long does she ride her bike? So pause this video like always and see if you can answer that question: how long is her bike ride home?

All right, now to help us answer that question, I'm going to set up a timeline. So that's my timeline there, and let's say that everything is going on between 14 hours and it looks like between, actually, past 15 hours. So I'll go to 16 hours. So that is hours, and this is 15 hours, and then 16 hours would be maybe right over there 16 hours.

And this would be 14 and a half, just to make things a little bit clearer. This would be 15 and a half, just like that. Actually, it'd be a little bit— it would be something like that. And so let's see, she leaves school at 14:55. Where is that on this timeline? Well, 14:55 is 5 minutes before 15.

So it's going to be roughly right over here, so that is when Colette leaves. So that is 14:55, and then when she arrives, 15:25, that's 25 minutes after 15 hours, so that is right over there. So this right over there is when she arrives home, 15:25.

And so how long is that? Well, the way I think about it is if we go from 14:55 to 15:00, that is 5 minutes. So this part right over there is five, and then to go from 15:00 to 15:25, that's another 25 minutes.

So the total length of her trip in time is going to be 5 minutes plus 25 minutes. 5 plus 25 is 30. 30 minutes, and we are done.

Protecting the Sun Bears of Borneo | National Geographic
Introducing Khanmigo Teacher Mode

More Articles

View All
Farming for the Planet | Podcast | Overheard at National Geographic
[Music] I’m going to tell you about this place that 10 years ago didn’t even exist. And what created this wasn’t brilliance; it was freedom to allow nature to show us a better way. That’s exactly how my wife Molly and I rebuilt this whole farm over the la…
Seth Klarman: The Investing Opportunity of a Generation (First Interview in 12 YEARS)
Do you think that opportunity that you had in 1979 still exists in 2023? Seth Clarman is a legendary investor who just broke his 12-year silence to reveal the secrets to outperforming the market and the investment opportunity he would dedicate his life t…
Sexual reproduction and genetic variation | Middle school biology | Khan Academy
[Narrator] Have you ever wondered why children often look a little similar but also very different from their biological parents, or even how biological siblings tend to share some common features but still have different traits from each other? To answer…
Interpreting computer regression data | AP Statistics | Khan Academy
In other videos we’ve done linear regressions by hand, but we mentioned that most regressions are actually done using some type of computer or calculator. So, what we’re going to do in this video is look at an example of the output that we might see from …
Why War Zones Need Science | Podcast | Overheard at National Geographic
So you can see a skull very clearly up there, and actually, if you look closely, you can see there’s a number of other bones: long bones, bones of the foot. So, a whole pile of bones here. This is Ella Al-Shamahi; she’s standing on a rocky hillside next t…
How has the position of Speaker changed over time? | US Government and Civics | Khan Academy
How is the position of Speaker of the House changed over time? The position of Speaker of the House has changed a lot over time, and it has had powerful early advocates. Henry Clay, an early Speaker of the House who had three different terms as Speaker, …