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.

Introduction to chemistry | Atoms, compounds, and ions | Chemistry | Khan Academy
Designing the Costumes | Saints & Strangers

More Articles

View All
LearnStorm 2022
Hi teachers, Sal Khan here from Khan Academy. I just wanted to remind you that LearnStorm is back and better than ever. In case you’re wondering why you should use LearnStorm or the LearnStorm tracker, we just have to remember what it’s like to be a lear…
Automatic stabilizers | National income and price determination | AP Macroeconomics | Khan Academy
So what we have depicted in this diagram is the business cycle that we have looked at in other videos. This horizontal axis is time; the vertical axis is real GDP. What we see in this dark blue color, you can view that as full employment output at differe…
Aggregate production function and economic growth | APⓇ Macroeconomics | Khan Academy
So we are posed with the question: all else equal, which of the following would likely cause aggregate production to go up? Pause this video and see which of these you think would do that. All right, now let’s work through this together. This first one s…
How to make your money grow | Banking | Financial Literacy | Khan Academy
In this video, we’re going to talk about the power of compound interest. To help us understand that, we’re going to compare it to simple interest. Let’s say we have an interest rate of 16% per year and we put in initially $1,000. Simple interest would te…
Is this the coolest office? pt. 3
And presidential issues in the United States—nothing positive—but it happens to be from the day of my birthday, so I can’t change anything about that. I see your door over there; it’s quite interesting. What inspired you with that decision? This is my se…
Area model for multiplying polynomials with negative terms
In previous videos, we’ve already looked at using area models to think about multiplying expressions, like multiplying x plus seven times x plus three. In those videos, we saw that we could think about it as finding the area of a rectangle, where we could…