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.

The Jacobian Determinant

2015 AP Physics 1 free response 3b

View All

Weak acid equilibria | Acids and bases | AP Chemistry | Khan Academy

Before we get into the topic of weak acid equilibria, let’s look at a strong acid first. So let’s say that H A is a strong acid and reacts with water to produce the hydronium ion and A minus, the conjugate base. 2H A—technically, the reaction comes to an…

One Woman's Remarkable Journey to Protect Lions | Short Film Showcase

[Music] Some of the small things that I love about Wonka is just this analyzed beautiful, the best, the world life. [Music] I love being in the voice, I love our life conformation. [Music] In the symbol society, it’s difficult for women to be away from th…

Ideal circuit elements | Circuit analysis | Electrical engineering | Khan Academy

We’re now ready to start the study of circuit analysis and to design circuits and analyze circuits. One of the things we need to do is have something to build circuits with, and that’s what we’re going to talk about in this video. The idea is we’re going …

15 Ways To MAKE PEOPLE TRUST YOU

Hey there. We know how you feel. You have good intentions, but you can’t seem to get anyone to trust you. And worse, you have no idea why anyone would trust you. In fact, this has caused you to trust yourself even less. But did you know that all of that c…

Peter Lynch and Warren Buffett: When to Sell a Stock

Knowing when to sell stock is arguably the hardest question to answer in all of investing. There seems to be countless books, articles, and videos focused on how to analyze a stock and when you should buy a particular stock. However, there is much less at…

The Philosopher of Pleasure | EPICURUS

Pleasure is the first good. It is the beginning of every choice and every aversion. It is the absence of pain in the body and of troubles in the soul. Epicurus. In the third century BC on the Greek island of Samos, a man was born that would become the fo…

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

More Articles