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.

YC SUS: Kat Mañalac and Eric Migicovsky discuss Week 2 SUS Lectures

Finding Something to Live and Die For | The Philosophy of Viktor Frankl

View All

Significant | Vocabulary | Khan Academy

Wordsmith, hello! We’ve got important work to get to, so I won’t keep you. The word we’re looking at in this video is “significant.” It’s an adjective. It means important, worth paying attention to, a large amount. Something can be emotionally significan…

High on Life': San Francisco’s Skaters Get Groovy | Short Film Showcase

There’s never a moment where I feel satisfied with skating. It’s always in you, and then when you find, when you take the skates off, you move through life skating. When I come out here to skate, I come out here to find this other space that’s just incred…

4 Ways to CURE Social Media Addiction and GET WORK DONE

Hey, it’s Joey, and welcome to Better Ideas. Now, a lot of people in this highly digital, social media-driven society are finding it increasingly difficult to get work done without getting distracted by social media. I’ve experienced the same problem, whe…

Your New Sidekick (Notepad!)

This is the Sidekick Notepad. Your new desk capture companion, here to help you stay organized and look good, like a good sidekick should. Slimly sized to sit between you and your keyboard, as tested by thousands of users on all their different desktops, …

Don’t Feel Harmed, And You Haven’t Been | The Philosophy of Marcus Aurelius

Marcus Aurelius pointed out that regardless of the severity of circumstances, there’s always a choice in how we judge them. “Choose not to be harmed—and you won’t feel harmed. Don’t feel harmed—and you haven’t been,” he stated. Marcus’ instruction sounds…

Woodpeckers Defend Their Food Supply | National Geographic

[music playing] NARRATOR: Day breaks over the lovely forested south rim of the canyon, lighting up a dead pine that would seem to have little purpose. But this pine is the central bank and trust of the acorn woodpecker. And every inch is studded with nea…

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

More Articles