The discussion focuses on calculating the average speed of a road trip using the formula for average speed based on distance and time. The driver traveled 54.0 km at an average speed of (48.0 + 19) km/h and 86.0 km at (43.0 - 0) km/h. The total time taken for the trip was calculated to be 168.4 minutes, which converts to approximately 2.8066 hours. The final average speed for the entire trip, rounded to three significant figures, is 49.9 km/h.
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Lana Elcic said:.807.
Why are you dividing this? I'm just trying to fully understand the problem for the test! :)
Bystander said:48.4/60 = ?
Bystander said:2 hrs is 120 min, 48.4 min. is .8xxx hrs. --- ?
2.8066?Bystander said:Total time in hours is then what?
Nope. Right idea.Lana Elcic said:So is it just 140 km / 2.48 hr = 56.452?
Nope.Lana Elcic said:Doesnt 168.4 minutes convert to 2.48 hours?
... and the answer is ...?Lana Elcic said:2.8066?
Bystander said:Nope. Right idea.
Nope.
... and the answer is ...?
Sorry about all the distractions. I know it's enough to rattle anyone. Couple or three things to remember: 1) try to post in the HW forum (for physics questions, anyway); 2) one step at a time; 3) re-read the question to be certain you're answering what's been asked; 4) pay attention to details, particularly when converting units (minutes to hours is something public schools haven't done correctly for ~ 20 years); 5) PF busy season has just started the last week or two, and there can be a lot of help that just isn't.
You're in business.Lana Elcic said:Round your final answer to three significant figures.
So 49.9!Bystander said:You're in business.