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.

My Video Went Viral. Here's Why

How Does Kodak Make Film? (Kodak Factory Tour Part 2 of 3) - Smarter Every Day 275

View All

What Makes The Top 10% Of Founders Different? - Michael Seibel

One of the questions I get often during the batch of YC is what separates out a top 10% founder versus everyone else. When I started at YC, I didn’t really have enough context to know as a founder. My own company, of course, had my own friends, but that w…

Derivative of a parametric function

So what we have here is X being defined in terms of T, and Y being defined in terms of T. Then, if you were to plot over all of the T values, you get a pretty cool plot just like this. So, you know, you try T equals z, figure out what X and Y are; T is eq…

How These Women Are Saving Black Mothers' Lives | National Geographic

My name is Brianna Green. I’m a perinatal community health worker. Every day is heavy, and it is life and death. The issue at hand with maternal mortality is primarily the disparity that exists between Black women and White women in this country, and part…

Joan Lasenby on Applications of Geometric Algebra in Engineering

So Joan, as we walk through geometric algebra, I think the best place to start might be through a more tangible example. You’re doing a project with drones here at Cambridge; can you explain that first? Yes, so we’re doing a project with drones. This is …

Creativity break: What do you do to get into your creative zone? | Algebra 1 | Khan Academy

Whenever I want to have a salute, come up with a solution to a problem and I don’t have it, my immediate like reaction is to go outside and go on a walk. I love walking in all kinds of weather. It’s kind of, um, it’s just I feel like with the peace and ca…

How I Bought This House For $0

I’m very proud to say that this property right here was free. It cost me zero dollars. I was able to buy an income-generating property here in Los Angeles for nothing, and I think it’s at this point that people are supposed to comment, “It’s free real est…

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

More Articles