need clarification (Graph): how many kilometers does the car run per hour?
- Thread starter minyoongi
- Start date
I can barely read that tiny image, but it looks to me as if the problem statement included a graph. This graph's axes appear not to be labelled, but based on context, I'll assume that the x-axis means "number of hours passed" and the y-axis means "Kilometers travelled." The graph's information shows a line segment going from the origin (0, 0) to (2, 60). The question asks you to find the average speed of the car, in kilometers per hour.
Assuming all of the above is what is written, then here's a hint to get you started: Think about how many kilometers the car has travelled in the two hours depicted in the graph. Assuming the car travelled at a constant rate over those two hours, what would its speed need to be to travel (how many?) kilometers?
Assuming all of the above is what is written, then here's a hint to get you started: Think about how many kilometers the car has travelled in the two hours depicted in the graph. Assuming the car travelled at a constant rate over those two hours, what would its speed need to be to travel (how many?) kilometers?
Sorry for the small image. I have no idea why it's like that. The car travels 60 kilometers in 2 hours. I divide that in half because I'm looking for how fast it goes for an hour. I get 30 kilometers, am I right?
That's the answer I get. In the future, if you're ever unsure about an answer, you can check it yourself. Your proposed solution is that the car goes 30 km/hr, so let's "run the problem in reverse." Travelling at a constant rate of 30 kilometers an hour, the car would then travel 60 kilometers in two hours. That matches the given information, so the answer is correct. 
That's the answer I get. In the future, if you're ever unsure about an answer, you can check it yourself. Your proposed solution is that the car goes 30 km/hr, so let's "run the problem in reverse." Travelling at a constant rate of 30 kilometers an hour, the car would then travel 60 kilometers in two hours. That matches the given information, so the answer is correct.
Okay, thank you so much! Just needed to clarify this and I got the answer I needed
Thank you!!